I just checked out that Guardian tactical voting guide. I'm in a constituency where "Lib Dem supporters who are very keen to keep the Conservatives out should consider voting Labour in these constituencies, even if a movement in line with the current national polls would bring the Lib Dems into distant contention locally." The basis for this? "Lib Dem supporters should consider a vote for the incumbent to keep out the Tories". This is based on a not very compelling Labour lead last time round, and appears to be based on a single swing percentage (not sure how that single 'swing' figure is supposed to mean anything in a 3-way contest, it makes no sense to me but I admit I haven't studied that stuff). What they don't take into account is that the Labour candidate who's now stepped down (so there is no incumbent, actually) was an absolute legend. One of about 3 or 4 Labour MPs I could vote for in good conscience, based on their voting record. Without him, I'd have been voting Lib Dem years ago anyway, as would many others I'm sure. So in my constituency, that tactical voting guide appears to be quite worthless.