Looks to me like they're using language to appeal to voters as far as centre-left while still delivering policies that fall to the right, while constantly telling those floating voters that Corbyn is an extremist can't be trusted.
There seems to be a lot of focus so far today on his affordable housing plan and how it's not actually affordable for a lot of people.
http://www.independent.co.uk/news/uk/politics/david-cameron-s-solution-to-the-housing-crisis-only-affordable-to-those-who-earn-more-than-50000-a6684246.html...