the graph on UK PollingReport doesnt paint that picture at all
UK Polling Report
then again im confused by their graph as the poll breakdown below shows it to be neck and neck
Survey End Date CON (%) LAB (%) LD (%) UKIP (%) Grn (%) Con Lead
Survation/Mirror 2015-05-05 33 34 9 16 4 -1
YouGov/Sun 2015-05-04 33 33 10 12 5 0
YouGov/Sun 2015-05-03 34 33 9 12 5 1
Ashcroft/ 2015-05-03 32 30 11 12 7 2
Populus/ 2015-05-03 34 34 10 13 5 0
YouGov/Sunday Times 2015-05-02 34 33 8 13 5 1
Survation/Mail on Sunday 2015-05-02 31 34 8 17 4 -3
Survation/Mirror 2015-05-01 33 34 9 16 3 -1
YouGov/Sun 2015-05-01 33 34 8 14 5 -1