Holding(s) in Company

Iomart Group PLC
16 January 2008



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):

14 January 2008


6. Date on which issuer notified:

15 January 2008


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

12%


8. Notified details:


A: Voting rights attached to shares

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

GB0004281639                              11,460,184                11,460,184




Resulting situation after the triggering transaction (vii)

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

                             Direct        Direct Indirect (xi) Direct Indirect
                                           (x)

GB0004281639                  12,173,517           12,173,517           12.242%


B: Financial Instruments

Resulting situation after the triggering transaction (xii)

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







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

                                12,173,517                              12.242%


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        Fund      Beneficial owner
 Managing  shares held   of issued  Registered
   Co.                     share       Owner
                          capital
Gartmore
Fund
Managers    3,000,908       3.018%  HSBC GLOBAL  56690   GARTMORE FUND MANAGERS
Limited       ---------    -------- CUSTODY              LTD A/C GARTMORE UK &
                                    NOMINEE UK           IRISH SMALL COMPANIES
                                    LTD

            3,000,908       3.018%
              ---------    --------

Gartmore
Investment
Limited     4,831,873       4.859%  GOLDMAN      63285   THE GARTMORE UK SMALL
                                    SACHS                CAP BEST IDEAS FUND
                                    NOMINEES             LIMITED
                                    LTD
Gartmore
Investment
Limited     1,273,385       1.281%  BNY GIL CLT LST      GARTMORE SMALLER
                                    A/C NOMS             COMPANIES TRUST PLC
                                    LTD A/C LST
Gartmore
Investment
Limited       773,477       0.778%  BNY GIL CLT  56640   GARTMORE GROWTH
                                    A/C NOMS             OPPORTUNITIES PLC
                                    LTD A/C
                                    NWSC
Gartmore
Investment
Limited     2,293,874       2.307%  NORTRUST     54550   STRATHCLYDE PENSION
              ---------    -------- NOMINEES             FUND
                                    LIMITED

            9,172,609       9.224%
              ---------    --------

           12,173,517      12.242%
              =========    ========


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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