Holding(s) in Company

Iomart Group PLC
15 October 2007


TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached (ii):

Iomart Group plc

2. Reason for the notification (please state Yes/No):

An acquisition or disposal of voting rights: (Yes)

An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached: (No)

An event changing the breakdown of voting rights: (No)

Other (please specify) : (No)

3. Full name of person(s) subject to the notification obligation (iii):

Gartmore Investment Limited

4. Full name of shareholder(s) (if different from 3.) (iv):

See Section 9

5. Date of the transaction (and date on which the threshold is crossed or
reached if different) (v):

10 October 2007

6. Date on which issuer notified:

11 October 2007

7. Threshold(s) that is/are crossed or reached:

14%


8. Notified details:


A: Voting rights attached to shares

Class/type of shares if possible        Situation previous to the
using the ISIN CODE                    Triggering transaction (vi)
                                   Number of    Number of voting
                                   shares       Rights (viii)

GB0004281639                       14,992,370   14,992,370




Resulting situation after the triggering transaction (vii)

Class/type of shares Number of shares  Number of voting rights    % of voting rights
if possible using                      (ix)
the ISIN CODE
                     Direct            Direct (x) Indirect (xi)   Direct    Indirect

GB0004281639         14,035,184                   14,035,184                14.114%


B: Financial Instruments

Resulting situation after the triggering transaction (xii)

Type of     Expiration Date  Exercise/Conversion Number of voting     % of voting
financial   (xiii)           Period/ Date (xiv)  rights that may be   rights
instrument                                       acquired if the
                                                 instrument is
                                                 exercised/
                                                 converted.





Total (A+B)
Number of voting       % of voting
rights                 rights

14,035,184             14.114%


9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable (xv):

   Fund      Number of  Percentage UK Registered   Fund     Beneficial
 Managing   shares held of issued      Owner                   owner
    Co.                   share
                         capital
Gartmore      2,880,908     2.897% HSBC GLOBAL   56690    GARTMORE FUND
Fund                               CUSTODY                MANAGERS LTD A/
Managers                           NOMINEE UK             C GARTMORE UK &
Limited                            LTD                    IRISH SMALL
                                                          COMPANIES

              2,880,908     2.897%

Gartmore      4,013,540     4.036% GOLDMAN SACHS 63285    THE GARTMORE UK
Investment                         NOMINEES LTD           SMALL CAP BEST
Limited                                                   IDEAS FUND
                                                          LIMITED
Gartmore      1,273,385     1.281% BNY GIL CLT A LST      GARTMORE
Investment                         /C NOMS LTD A          SMALLER
Limited                            /C LST                 COMPANIES TRUST
                                                          PLC
Gartmore        673,477     0.677% BNY GIL CLT A 56640    GARTMORE GROWTH
Investment                         /C NOMS LTD A          OPPORTUNITIES
Limited                            /C NWSC                PLC
Gartmore      3,000,000     3.017% VIDACOS       VOLANT   THE ALPHAGEN
Investment                         NOMINEES LTD           VOLANTIS FUND
Limited                            A/C 2303               LIMITED
Gartmore      2,193,874     2.206% NORTRUST      54550    STRATHCLYDE
Investment                         NOMINEES               PENSION FUND
Limited                            LIMITED

             11,154,276    11.217%

             14,035,184    14.114%


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:

All shares are held indirectly


Email contact [e-mail]


14. Contact name:

Stewart Moir


15. Contact telephone number:

0141 931 6400



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