"Ocean was in service until Queen Elizabeth was in commission "
WEBF - you spent years telling us that Ocean wasn't a replacement for a proper carrier.
The main threat that Russia could post in the Atlantic is from submarines, with aircraft launched anti ship missiles also being something to worry about. The carrier provides the means to defend against both
Its also a major target of both - we have to divert and SSN and T45 to protect the carrier - and we don't have enough of either TBH