ChrisE, I've just realised if I tell you which 2 I need you might be able to help more.
They are
39. Sounds like vegetation at Ivinghoe (9)
40. Rocky place of agriculture (9)
Bayswater
Becontree
Blackwall
Colindale
Greenford
Greenwich
Hampstead
Harlesden
Kingsbury
Limehouse
Northwood
Queensway
Redbridge
Southgate
Southwark
Stockwell
Stratford
Upminster
Westferry
Wimbledon
Acton Town
All Saints
Bow Church
Chalk Farm
Cutty Sark
East Acton
East India
Gants Hill
Green Park
Maida Vale
Marylebone
Old Street
Park Royal
South Quay
Tower Hill
Upton Park
West Acton
White City
Wood Green