Mick...
2020 - unless there has been a drastic realignment of the proposed F-35 production schedule...
I would suggest a realignment of the "delivery" schedule, plus trials, training, LSD, ISD, IOC, etc., etc. Harding must have got those dates, info, suppositions, etc., from somewhere. Surely he would not have made them up, would he?
As for the supposition that French/US Navy a/c will operate from Prince of Wales, how long will it take to install the support infrastructure for their cabs? It will not be so bad if UK Air goes for 35C rather than 35B, but for Rafale?
Whatever, this entire SDSR has been nothing more than can of SH!TE from day 0.
As for the "aid" to the tune of a billion (ish) GBP to india - this is what it is buying this year:
India Nears Fielding Of New SAM Systems | AVIATION WEEK
Go figure...