You saw with your own eyes and heard with your own ears how they acted after the last General Election. These people have no grasp of strategy.
Duh, you do a warm up policy at the start of your conference and a big one towards the end. We have free school meals for all infant school age children and will go into the election promising free meals for all primary school children as a big announcement. Labour have just done abolishing the bedroom tax for social housing tenants only so I presume there's a really huge one coming next Tuesday/Wednesday.