You should find some help on this from Hidden Art,
http://www.hiddenart.co.uk.
It is an organisation to help designers based in East London. Its latest newsletter is advertising these spaces for rent:
Studio/Gallery Space for Rent -The Hat Gallery on Broadway Market has a large basement to rent with retail option. �90 per week. For further information contact Alva, tel 020 7923 4275.
Space available -2/3 spaces available in jewellery studio in Clerkenwell. The second floor studio is large, bright, airy and well equipped. For further details contact Joe Richardson or Gillian Colver on 020 7608 2373 or email
[email protected]
Hope this is useful.