Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

Deltex Medical Group plc

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 notification obligation:

Gartmore Investment Limited

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

See attached schedule

5. Date of the transaction and date on which the threshold is crossed or reached:

22nd March 2010

6. Date on which issuer notified:

23rd March 2010

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

11%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

GB0059337583

12,821,111

12,821,111

14,003,111

14,003,111

11.034%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ Conversion Period

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

-

-

-

-

-

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date

Exercise/ Conversion period

Number of voting rights instrument refers to

% of voting rights

-

-

-

-

-

Nominal

Delta

-

-

Total (A+B+C)

Number of voting rights

Percentage of voting rights

14,003,111

11.034%

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

n/a

Proxy Voting:

10. Name of the proxy holder:

n/a

11. Number of voting rights proxy holder will cease to hold:

n/a

12. Date on which proxy holder will cease to hold voting rights:

n/a

13. Additional information:

All figures are based on the Company's issued share capital of 126,914,336 as provided by Exshare

E mail contact [email protected]

14. Contact name:

RDU

15. Contact telephone number:

0207 782 2324

Share Description

Fund managing Co.

Shares held

% of Issues Share Capital

UK Registered Owner

Beneficial Owner

Equities

DELTEX MEDICAL GRP

ORD GBP0.01

Gartmore Fund

Managers Limited

Gartmore

Investment Limited

6,562,815

1,132,000

6,308,296

5.171%

0.892%

4.971%

HSBC GLOBAL CUSTODY NOMINEE UK LTD

NORTRUST NOMINEES LIMITED

VIDACOS NOMINEES LTD A/C 2303

GARTMORE FUND MANAGERS LTD A/C GARTMORE UK & IRISH SMALLER COMPANIES

STRATHCLYDE PENSION FUND

THE ALPHAGEN VOLANTIS FUND LIMITED

14,003,111

11.034%

14,003,111

11.034%