Mark wrote:

two of these

http://www.screwfix.com/app/sfd/sea/...id=JOVDQ1GUS1G
4WCSTHZOSFFY?_dyncharset=UTF-8&q=d14972&pn=1&pd=1&pi=1&cn=1&cd=1&x=9&y=3

http://tinyurl.com/bu4n3


Thank you, I'll give them a go.