CONFERENCE CALL PARTICIPATION DETAILS – July 31, 2008 at 8:30 a.m. (EST)

Participant Dial-In Numbers:                         +1 (888) 459-5609 (US Toll Free)

                        +1 (973) 321-1024 (International)

Conference ID:                         51488921

Please call to register at least 10 minutes before the conference call begins.

The conference call will be webcast live in the ‘presentations’ section of the Investor Relations page of Aspen's website, which is located at www.aspen.bm.  The earnings press release and a detailed financial supplement will be posted to the website, as well as a brief slide presentation which may be used for reference during the earnings call. 

REPLAY DETAILS

A replay of the call will be available for 10 days via telephone and Internet starting two hours following the end of the live call.

Replay Access:                        +1 (800) 642-1687 (US Toll Free)

                        +1 (706) 645-9291 (International)

                        www.aspen.bm

Replay ID:                        51488921

About Aspen Insurance Holdings Limited

Aspen provides reinsurance and insurance coverage to clients in various domestic and global markets through wholly-owned subsidiaries and offices in Bermuda, France, Ireland, the United States, the United Kingdom, Switzerland and Singapore. For the year ended December 31, 2007, Aspen reported gross written premiums of $1.8 billion, net income of $489.0 million and total assets of $7.2 billion. For more information about Aspen, please visit www.aspen.bm.

Aspen’s Ratings                                   

Aspen Insurance UK Limited             Aspen Insurance Limited
A (Strong) Standard & Poor's   A (Strong) Standard & Poor's
A (Excellent) A. M. Best                         A (Excellent) A. M. Best
A2 (Good) Moody's                                    A2 (Good) Moody's

Contacts:

Aspen Insurance Holdings Limited                       

Tania Kerno, Head of Communications                      T +44 (0) 20 7184 8855

Noah Fields, Head of Investor Relations                       T +1 (441) 297-9382