Thanks for all the info guys, wish my wood work skills were as good as yours Nige52 , i noticed that the c clamps / sash clamps are different to mine,.

A c clamp doesn't appear right unless you cut part of the clamp off then youve got to mount it sash clamps usually fit on en edge are there any clamps for sale that are L shaped that can be fitted straight into place ?

Any links to good clamps to use would be welcome.

Paul