Holding(s) in Company

Iomart Group PLC
11 April 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: (No)


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) : (Yes) Placing


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):

30 March 2007


6. Date on which issuer notified:

4 April 2007


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

10%


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                            Below 5%       Below 5%




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                   10,639,195           10,639,195           10.70%


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

10,639,195                                   10.70%


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    1,936,544       1.948%  HSBC GLOBAL  56690   GARTMORE FUND MANAGERS
Limited       ---------    -------- CUSTODY              LTD A/C GARTMORE UK &
                                    NOMINEE UK           IRISH SMALL COMPANIES
                                    LTD

            1,936,544       1.948%
              ---------    --------

Gartmore
Investment
Limited     3,218,540       3.237%  VIDACOS     VOLANT   THE ALPHAGEN VOLANTIS
                                    NOMINEES             FUND LIMITED
                                    LTD A/C
                                    2303
Gartmore
Investment
Limited     3,218,540       3.237%  GOLDMAN      63285   THE GARTMORE UK SMALL
                                    SACHS                CAP BEST IDEAS FUND
                                    NOMINEES             LIMITED
                                    LTD
Gartmore
Investment
Limited       669,617       0.673%  BNY GIL CLT LST      GARTMORE SMALLER
                                    A/C NOMS             COMPANIES TRUST PLC
                                    LTD A/C LST
Gartmore
Investment
Limited        96,933       0.097%  BNY GIL CLT  56640   GARTMORE GROWTH
                                    A/C NOMS             OPPORTUNITIES PLC
                                    LTD A/C
                                    NWSC
Gartmore
Investment
Limited       981,362       0.987%  NORTRUST     54550   STRATHCLYDE PENSION
                                    NOMINEES             FUND
                                    LIMITED
Gartmore
Investment
Limited       517,659       0.521%  BNY GIL CLT  63076   GARTMORE GO C SHARE
              ---------    -------- A/C NOMS             POOL
                                    LTD A/C
                                    NWSC

            8,702,651       8.752%
              ---------    --------

           10,639,195      10.700%
              =========    ========


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:

Alison Averono


15. Contact telephone number:

0207 782 2324



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