Please could you let me know if there is a Yorkshire Terrier rescue,

                     many thanks, Jan.

Jan yes there are a few :)
try these

Lincoln and Humberside Yorkshire Terrier Club Rescue
Mrs E A Stuart, Jacksdale, Notts. Tel: 01773 768071 or 07970 475157

Southern Yorkie Rehoming
Mrs Depree, Sompting, West Sussex. Tel: 01903 754690

Yorkshire Terrier Club of Scotland Rescue
Miss E Blackwood, Throsk By Stirling. Tel: 01786 813249

Yorkshire Terrier Club Rescue
Mrs B Evans (Co-ordinator), Brickhill, Bedford. Tel: 01234262515

Yorkshire Terrier Rescue
Mr T & Mrs W Souter, Cornwall. Tel: 01752 785722