Latest Populus, Ashcroft and YouGov polls

Monday is the busiest day each week for polling results, though today we have just the three regulars - YouGov's daily poll, Populus's twice weekly poll and Ashcroft's weekly poll. Topline figures are:

Populus - CON 33%, LAB 36%, LDEM 8%, UKIP 15%, GRN 4% (tabs) Ashcroft - CON 30%, LAB 31%, LDEM 8%, UKIP 19%, GRN 5% (tabs) YouGov/Sun - CON 34%, LAB 33%, LDEM 6%, UKIP 15%, GRN 6%

There are some methodological differences between the pollsters meaning there are some consistent "house effects" (Populus, for example, tend to consistently show higher shares for Labour and Conservative than Lord Ashcroft's polls do), but all three are showing figures pretty much in line with their own recent polling: Ashcroft an extremely narrow Labour lead, Populus a Labour lead of a few points, YouGov pretty much neck-and-neck.