I would suggest that the likely option, without a current threat requiring a carrier, is to retire the GR7/9 force early, try and sell off the first CVA to India or elsewhere (including the GR7/9 wing as air assets)
Tell you what, why don't we simply stop paying billions of pounds to India in the form of aid, which they only use to purchase our military harware? Then we could afford to keep our CVF/JSF/F18F etc....
Just a thought.....