I've had responses from my Labour and LibDem candidates on answer to the question whether they would vote against the current TTIP proposal under which a company can sue the government for decisions arrived at democratically. The LibDem said she would vote against any agreement that permitted this; the labour candidate was more cautious and only committed to voting against it in its current form.
Okay, I have to admit I hadn't heard of TTIP, so I had to read up on it before commenting.

From all I can find it appears to be an agreement being made between the US & the EU. As such, as long as we are part of the EU, I don't see your local candidates having the opportunity to vote for or against it.

Of course, I'm open to correction! (but not with whips!)