Labour haven't really campaigned in my constituency (Ayr, Cumnock & Carrick) over the last few elections, don't recall anyone knocking on the door or seeing any party representatives other than the SNP either at the polling station. Changed days - I remember Donald Dewar chapping my door during the 2000 by-election for Holyrood back when it was just Ayr. You can just about understand non-campaigning but a formal alliance would surely be too much for Labour, although I'm not 100% sure about the Lib-Dems.