Populus and YouGov polls
Populus tonight has topline figures of CON 36%(+4), LAB 27%(-1), LDEM 28%(-3). Changes are from their poll a week ago which showed the Conservatives with just a 1 point lead over the Lib Dems, so it supports the slight Tory recovery and slight falling back of the Lib Dems we've had over the last week (in fact, along with the rather odd Ipsos MORI poll, it's the highest Conservative score since before the first debate).
Populus have also conducted a poll in Scotland, which has topline figures of CON 16%, LAB 37%, LDEM 24%, SNP 19%. Like the YouGov Scottish poll at the weekend it shows comparatively little change in Scotland since the last general election. It doesn't look as though we should expect many seats to change hands North of the border.
YouGov meanwhile has figures of CON 33%(nc), LAB 29%(+1), LDEM 28%(-1), and clearly there is no significant change from yesterday's figures. Despite appearances, the trends here are not really contradictory - they need to be seen in the context of the fieldwork dates. A week ago when Populus's last poll was conducted YouGov was showing the Conservatives on 31% and the Lib Dems on 34%, so both are reporting the same pattern... it's just the difference between a weekly and a daily poll.
UPDATE: ComRes's rolling poll for ITV and the Indy has figures tonight of CON 33%(+1), LAB 29%(+1), LDEM 29%(-2). The changes are within the margin of error, but like YouGov's poll tonight those slight movements are away from the Lib Dems and towards Labour.