I believe the carriers have the ability to have catapults installed.
No....unfortunately they can't.
The carrier project has been botched about as badly as it could possibly be. We will pay the same as America pays for its hundred-thousand-ton, hundred-aircraft nuclear powered supercarriers. For this money we will get sixty-thousand-ton, forty-aircraft medium sized gas turbine ships.
Gas ships can't have catapult launch - lacking the necessary steam - so our carriers won't be able to launch regular carrier planes or even be retrofitted to include cats at a future date, not without also replacing the gas turbine power system as well, which would probably cost as much as the carrier will in the first place and taking it out of service for years. This will hamstring the critical radar aircraft and make them hugely more expensive. Some kind of unique, custom rotary-wing solution will be needed. This will never fly as high or see as far as a nice cheap Hawkeye (as used by the US Navy, France and many other overseas customers).
So.....for the same price the Yanks pay we're getting cheap arse non-nuclear boats that'll never be able to launch standard carrier aircraft or operate AEW planes anywhere near as effective as the venerable Hawkeye. Supposedly we're entrusting the air defense of these boats to the new type 45 destroyers. The billion pound ones that don't have a weapon system yet......
Gee thanks Mr Brown.