Well you can start with an article from 2007 entitled
MoD seeks a way out of Typhoon contract - Times Online which directly mentioned cancellation and reduction adding to other speculation like the cancellation of the Future Lynx.
As for saying the UK won't get the JSF, on what basis? The original Times article that this new one draws on actually mentioned consideration, pretty much like most of the major projects are undergoing at the moment. No JSFs for the UK? Tell that to the JSF Programme Office and the companies working on it and have been working on the thing so it can operate on board the CVFs. Because they still think they are.