Mostly unworkable and/or unaffordable policies which won't stand up to scrutiny but may well attract votes. It should be noted to that voting patterns in general and by elections are different. We will see, whatever will be will be. A hung parliament is possible and may, I hope, result in PR coming back into discussion.
Although I recognise as a supporter of electoral reform it would be likely under single transferable vote, dependant on the level of qualifying percentage, more minority parties would be represented in parliament.