I would put a strong guess that the 2 UK bases will be Manchester and Edinburgh.
Thomas Rahmdahl just this week on the launch of MAN-TFS/LPA said that the growth 'doesn't stop there' with TFS being a year round route according to him but not bookable past March where all other routes are, so could be switching to a MAN based aircraft?
That with very recent media bytes of 'Manchester/Edinburgh-New York for £200 in 2017', one would expect a based aircraft at each for the routes to take place.