Nope, that's not it.
'Save Britain from TTIP' is not an option on the ballot paper, nor is 'Save the NHS'. There is no option for saving Britain from TTIP. If you vote REMAIN, you have to hope that the worst of TTIP is curbed in Brussels and/or that the Tories negotiate certain opt-outs. If you vote LEAVE, well then you get a government of Tories (who are totally, to a man woman and child, in favour of TTIP) negotiating trade deals with every developed and developing country on Earth. There's no reason to assume that Boris Johnson's government is going to be any less amenable to lobbying multinational corporations than the current one is, the only difference is we'll be negotiating from a position of considerably less strength.