G4S plc UK : G4S plc UK : Holding(s) in Company

               G4S plc UK : G4S plc UK : Holding(s) in Company

For filings with the FSA include the annex
For filings with issuer exclude the annex
TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES^i
1. Identity of the issuer or the underlying issuer
of existing shares to which voting rights are                        G4Splc
attached:^ii
2 Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights                                x
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                  Invesco Limited
notification obligation:^iii
4. Full name of shareholder(s)
(if different from 3.):^iv
5. Date of the transaction and date on
which the threshold is crossed or                         29 January 2013
reached:^v
6. Date on which issuer notified:                         30 January 2013
7. Threshold(s) that is/are crossed or                          15%
reached: ^vi, vii

8. Notified details:
A: Voting rights attached to shares^viii, ix
Class/type of  Situation previous        Resulting situation after the triggering
shares         to the triggering         transaction
               transaction
if possible    Number       Number       Number   Number of voting   % of  voting
using          of           of           of       rights             rights ^x
the ISIN CODE  Shares       Voting       shares
                            Rights       Direct   Direct Indirect    Direct   Indirect
                                                  ^xi    ^xii
GB00B01FLG62   198,966,277  198,966,277                  212,071,075          15.03%
B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial    Expiration    Exercise/          Number of voting     % of voting
instrument           date ^xiii    Conversion Period  rights that may be   rights
                                   ^xiv               acquired if the
                                                      instrument is
                                                      exercised/
                                                      converted.
C: Financial Instruments with similar economic effect to Qualifying Financial
Instruments ^xv, xvi
Resulting situation after the triggering transaction
Type of         Exercise    Expiration Exercise/  Number of voting      % of voting
financial       price       date ^xvii Conversion rights instrument     rights ^xix,
instrument                             period     refers to             xx
                                       ^xviii
                                                                        Nominal Delta
Total (A+B+C)
Number of voting rights                       Percentage of voting rights
212,071,075                                   15.03%

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable: ^xxi
Invesco Asset Management Limited - 51,855,283
Invesco Fund Managers Limited - 154,723,524
Invesco Asset Management Japan Limited - 143,411
Invesco Asset Management GmbH Germany - 99,312
Invesco PowerShares Capital Management LLC - 122,537
Invesco Hong Kong Limited - 13,500
Invesco Asset Management Limited & Invesco Asset Management Japan - 503,217
Invesco Asset Management Ltd & Invesco Hong Kong Ltd - 773,043
Invesco GT Management S.A - 24,628
Invesco Asset Management Ltd & Invesco GT Management - 3,812,620
Proxy Voting:
10. Name of the proxy holder:
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 information:
14. Contact name:                           Peter David, Company Secretary
15. Contact telephone number:               + 44(0)1293 554584

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Source: G4S plc UK via Thomson Reuters ONE
HUG#1674165