Negotiating is indeed possible at the rubbish schools, lashy, especially if you have skills that are in demand and the clock is ticking. (It is May, after all.) But on the whole I agree with T0nyGT. If you were to take on some special post, then there is a case to be made for more cash, but the better schools will have already made a good offer. On the other hand, what are the alternatives? Supply work and / or unemployment? And would this, by any chance, be one of Sir Isaac's scientific apple schools, lashy? Oh dear.