Holding(s) in Company

Iomart Group PLC
22 February 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: ( )


An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached: ( )


An event changing the breakdown of voting rights: ( )


Other (please specify) : ( Yes ) Initial notification


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

Black Rock Inc


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
reached if different) (v):

N/A


6. Date on which issuer notified:

21 February 2007


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

Above 5%


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                       N/A          N/A




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         4,061,140                    4,061,140                 5.11%


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

4,061,140              5.11%


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

BlackRock Investment Management (UK) Limited - 4,061,140 (5.11%)


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:

Majedie Asset Management Limited is a discretionary Fund Manager. It invests
funds on behalf of its clients on a segregated basis as well as through its
pooled vehicle Majedie Asset Management Investment Fund Company.



14. Contact name:



15. Contact telephone number:



Annex to Notification Of Major Interests In Shares (xvi)


A: Identity of the person or legal entity subject to the notification obligation


Full name (including legal form for legal entities):

BlackRock Inc


Contact address (registered office for legal entities):

33 King William Street

London

EC4R 9AS


Phone number:

0207 743 2098


Other useful information (at least legal representative for legal persons):

.................


B: Identity of the notifier, if applicable (xvii)


Full name:

.................


Contact address:

.................


Phone number:

.................


Other useful information (e.g. functional relationship with the person or legal
entity subject to the notification obligation):

.................


C: Additional information :

.................






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