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Omega Underwriting (OUH)


Wednesday 20 September, 2006

Omega Underwriting

Holding(s) in Company

Omega Underwriting Holdings PLC
20 September 2006


1) Name of company


2) Name of shareholder having a major interest

AMVESCAP PLC and subsidiary companies on behalf of discretionary clients

3) Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18

As 2

4) Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them

Chase Nominees Limited                          292,216
Bank of Ireland (Dublin) Nominees               300,258
HSBC Nominees                                    96,184
Vidacos                                      26,950,764
Mellon Bank (Pittsburgh) Nominees                51,528
State Street London                           2,432,230
Northern Trust Company (London)                 524,890

5) Number of shares/amount of stock acquired


6) Percentage of issued class


7) Number of shares/amount of stock disposed

Not disclosed

8) Percentage of issued class

Not disclosed

9) Class of security

Ordinary shares of 5p

10) Date of transaction

Not disclosed

11) Date company informed

20 September 2006

12) Total holding following this notification


13) Total percentage holding of issued class following this notification


14) Any additional information

None of these shares are beneficially owned by AMVESCAP. Subsidiary companies of
AMVESCAP have a large number of portfolio management clients for whom they act
as investment manager and investment advisor and by virtue of Section 203 of the
Companies Act 1985 AMVESCAP is deemed to have the same interest in the shares.

The above holding includes the following notifiable holdings:-

INVESCO Perpetual UK ICVC Series (UKICVC) holds 24,165,629 shares (19.99%)
registered in the name of Vidacos Nominees Limited.

15) Name of contact and telephone number for queries

J P Gorman 020 7935 0027

16) Name and signature of authorised company official responsible for making
this notification

Jeremy Gorman, Company Secretary

Date of notification 20 September 2006

                      This information is provided by RNS
            The company news service from the London Stock Exchange

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