Opinium/Observer - CON 26, LAB 37, LD 6, UKIP 21
The fortnightly Opinium poll for the Observer is out tonight and has topline figures of CON 26%(-1), LAB 37%(nc), LDEM 6%(-1), UKIP 21%(+1). There is no significant change from a fortnight ago, though for the record the 21% is the highest that UKIP have recorded with Opinium and the 6% is the lowest the Liberal Democrats have recorded this Parliament*. Opinium do tend to produce some of the higher UKIP scores, something they have put down to not using political weighting in their polls.
The Opinium poll also asked about the situation in Syria, and as with the recent YouGov polling on the same subject found very little support for arming the Syrian rebels. Only 24% supported sending arms or military supplies.
(*Whenever the Liberal Democrats suffer a really low score someone will wheel out an anecdote about remembering when the Liberal Democrats were just "an asterisk" - what polls sometimes do to show a figure is less than 0.5%, but not actually zero. As far as I've been able to tell this isn't actually true, or at least, has never been true in a national opinion poll. The lowest ever Liberal Democrat score I've managed to locate is 3% in an ICM poll for the Sunday Correspondent in 1989)
UPDATE: Just to re-emphasise, as I can see people already getting stupidly overexcited on twitter. The poll does not show any significant change or movement, it is just that Opinium's methodology normally shows very high scores for UKIP and Other parties (probably due to their decision not to politically weight), and therefore relatively low scores for Con, Lab and Lib Dem.