TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES


For filings with the FSA include the annex
For filings with issuer exclude the annex

+--------------------------------------------------------------+-----------+
|1. Identity of the issuer or the underlying issuer of existing|Enquest PLC|
|shares to which voting rights are attached:                   |           |
+--------------------------------------------------------------+-----------+

+---------+--+-+
|2 Reason for  |
|the           |
|notification  |
|(please tick  |
|the           |
|appropriate   |
|box or        |
|boxes):       |
+---------+--+-+
|An          |X|
|acquisition | |
|or disposal | |
|of voting   | |
|rights      | |
+---------+--+-+
|An          | |
|acquisition | |
|or disposal | |
|of          | |
|qualifying  | |
|financial   | |
|instruments | |
|which may   | |
|result in   | |
|the         | |
|acquisition | |
|of shares   | |
|already     | |
|issued to   | |
|which voting| |
|rights are  | |
|attached    | |
+---------+--+-+
|An          | |
|acquisition | |
|or disposal | |
|of          | |
|instruments | |
|with similar| |
|economic    | |
|effect to   | |
|qualifying  | |
|financial   | |
|instruments | |
+---------+--+-+
|An event    | |
|changing the| |
|breakdown of| |
|voting      | |
|rights      | |
+---------+--+-+
|Other    |  | |
|(please  |  | |
|specify):|  | |
+---------+--+-+
|         |  | |
+---------+--+-+

+----------------------------------------+--------------------+
|3. Full name of person(s) subject to the|Baillie Gifford & Co|
|notification obligation:                |                    |
+----------------------------------------+--------------------+
|4. Full name of shareholder(s) (if      |                    |
|different from 3.):                     |                    |
+----------------------------------------+--------------------+
|5. Date of the transaction and date on  |  6 December 2012   |
|which the threshold is crossed or       |                    |
|reached:                                |                    |
+----------------------------------------+--------------------+
|6. Date on which issuer notified:       |  7 December 2012   |
+----------------------------------------+--------------------+
|7. Threshold(s) that is/are crossed or  |         5%         |
|reached:                                |                    |
+----------------------------------------+--------------------+

+-------------------------+--------+--------+----------+--------+----------++---
-+
|
|
|8. Notified details:
|
+-------------------------+--------+--------+----------+--------+----------++---
-+
|A: Voting rights attached
|
|to shares
|
+-------------------------+--------+--------+----------+--------+----------++---
-+
|Class/type of            |Situation        |Resulting
|
|shares                   |previous         |situation
|
|if possible using        |to the           |after the
|
|the ISIN CODE            |triggering       |triggering
|
|                         |transaction      |transaction
|
+-------------------------+--------+--------+----------+--------+----------++---
-+
|Number                   |Number  |Number  |Number of          |% of       |
|of                       |of      |of      |voting             |voting     |
|Shares                   |Voting  |shares  |rights             |rights     |
|                         |Rights  |        |                   |           |
+-------------------------+--------+--------+----------+--------+----------++---
-+
|Direct                   |Direct  |Indirect|Direct    |Indirect|
+-------------------------+--------+--------+----------+--------+----------++---
-+
|OrdinaryShareGB00B635TG28|Below 5%|Below 5%|40,526,739|
|40,526,739||5.05|
+-------------------------+--------+--------+----------+--------+----------++---
-+
|                         |
+-------------------------+--------+--------+----------+--------+----------++---
-+

+-----------------+----------+----------+---------------------+-----------+
|B: Qualifying Financial Instruments                                      |
+-----------------+----------+----------+---------------------+-----------+
|Resulting situation after the triggering transaction                     |
+-----------------+----------+----------+---------------------+-----------+
|Type of financial|Expiration|Exercise/ |Number of voting     |% of voting|
|instrument       |date      |Conversion|rights that may be   |rights     |
|                 |          |Period    |acquired if the      |           |
|                 |          |          |instrument is        |           |
|                 |          |          |exercised/ converted.|           |
+-----------------+----------+----------+---------------------+-----------+
|N/A              |          |          |                     |           |
+-----------------+----------+----------+---------------------+-----------+

+----------+--------+----------+----------+----------+-------+----------+
|C:                                                                     |
|Financial                                                              |
|Instruments                                                            |
|with                                                                   |
|similar                                                                |
|economic                                                               |
|effect to                                                              |
|Qualifying                                                             |
|Financial                                                              |
|Instruments                                                            |
+----------+--------+----------+----------+----------+-------+----------+
|Resulting                                                              |
|situation                                                              |
|after the                                                              |
|triggering                                                             |
|transaction                                                            |
+----------+--------+----------+----------+----------+-------+----------+
|Type of   |Exercise|Expiration|Exercise/ |Number of |% of voting rights|
|financial |price   |date      |Conversion|voting    |                  |
|instrument|        |          |period    |rights    |                  |
|          |        |          |          |instrument|                  |
|          |        |          |          |refers to |                  |
+----------+--------+----------+----------+----------+-------+----------+
|N/A       |        |          |          |          |Nominal|Delta     |
+----------+--------+----------+----------+----------+-------+----------+
|          |        |
+----------+--------+----------+----------+----------+-------+----------+

+-----------------------+---------------------------+
|Total (A+B+C)                                      |
+-----------------------+---------------------------+
|Number of voting rights|Percentage of voting rights|
+-----------------------+---------------------------+
|   40,526,739          |   5.05                    |
+-----------------------+---------------------------+

+------------------------------------------------------------------------------+
|9. Chain of controlled undertakings through which the voting rights and/or the|
|financial instruments are effectively held, if applicable:                    |
+------------------------------------------------------------------------------+
|In the narrative below, the figures in brackets indicate the amount of voting |
|rights and the percentage held by each controlled undertaking where           |
|relevant.Baillie Gifford & Co, a discretionary investment manager, is the     |
|parent undertaking of an investment management group.Its wholly-owned         |
|subsidiary undertaking Baillie Gifford Overseas Limited [928526; 0.12%] is    |
|also a discretionary investment manager.Its wholly-owned subsidiary           |
|undertaking Baillie Gifford & Co Limited [3488860; 0.44%] is an OEIC          |
|Authorised Corporate Director and Unit Trust Manager which has delegated its  |
|discretionary investment management role to Baillie Gifford & Co.Its wholly   |
|-owned subsidiary undertaking Baillie Gifford Life Limited [13928314; 1.74%]  |
|is a life assurance company which procures discretionary investment management|
|services from Baillie Gifford & Co in respect of its own account              |
|shareholdings.                                                                |
+------------------------------------------------------------------------------+

+----------------------------------------------------------------+---+
|Proxy Voting:                                                       |
+----------------------------------------------------------------+---+
|10. Name of the proxy holder:                                   |N/A|
+----------------------------------------------------------------+---+
|11. Number of voting rights proxy holder will cease to hold:    |   |
+----------------------------------------------------------------+---+
|12. Date on which proxy holder will cease to hold voting rights:|   |
+----------------------------------------------------------------+---+

+--------------+--------------------------------+
|13. Additional|Notification is based on a total|
|information:  |         voting rights figure of|
|              |                     802,660,757|
+--------------+--------------------------------+
|14. Contact   |    Paul WatersCompany Secretary|
|name:         |                                |
+--------------+--------------------------------+
|15. Contact   |                   020 7925 4900|
|telephone     |                                |
|number:       |                                |
+--------------+--------------------------------+

Attachments

12101944.pdf