- Lib Dem electoral strategy was to downplay the coalition accomplishments, this amplified their losses because it meant the soft right went blue, The soft left they'd already lost by entering.
- Trust in the leadership and economy. Cameron had approval levels in excess of 40% according to Ipsos Mori, much higher than Miliband. The economy was accelerating and had been since 2013.
- Labour lost seats of a combination of factors but much of it came down to the left being more open to independence (probably because England has not elected a true left wing government in over 40 years).
- Revival would be a wrong word to use since they never really lost votes however it's a combination of good approval ratings in government and the referendum acting as a means to bring people under one banner.