Be wary; their companies house data and googled feedback makes them look like a scam:
Wentworth Direct Finance Ltd
Anthony Grant Clayton
4 THE MEWS
WROTHAM ROAD
GRAVESEND
KENT DA13 0QB
Company No. 04017809
Status: Inactive
Date of Incorporation: 20/06/2000
Country of Origin: United Kingdom
Company Type: Private Limited Company
Nature of Business (SIC(03)):
7499 - Non-trading company
Accounting Reference Date: 30/06
Last Accounts Made Up To: 30/06/2006 (DORMANT)
You'd be better off checking http://www.moneyfacts.co.uk and having a chat with the Citizens Advice Bureau about local Credit Unions in your area. For a start, there's no £49 broker fee (as Wentworth charge, contrary to the 1974 Consumer Credit Act) and the advice is trustworthy, impartial and free.