I don't think we have any ships of the right type to send.
From what I read on the web the Type 45s are mostly laid up having repairs or refits done.
The Type 23s don't have the best sort of missile arrangement to deal with the sorts of threats that are presented.
The astute class subs I think are mostly laid up being repaired - the one that is in good shape is being sent to Australia as part of UKAUS.
Our carriers can't sail without escorts (Type 45s and subs normally) so if there are no destroyers available the carriers can't sail.
So as far as I can tell we've effectively got no navy.
Our navy is being refitted to better deal with the sorts of problems drones present with some innovative and cost effective tech, but we are so way away away from completing this.
We could send some more planes (probably). But they would have to be based somewhere.
As for the Lib Dems, I don't really understand the strategy here. They were the one main party that appeared to stand for nuclear disarmament, so offering voters an alternative choice. Now it appears they have flip flopped to building our own weapons, which as well as being incredibly expensive is going to take a very long time to achieve given our experience with other capital defence projects and be very risky. If we are interested in going for some independent US weapons then maybe some free fall bombs (the French have these) would be more cost effective yet achieve the same objective all be it with some capability loss.
Our defence workforce at the moment is pretty much fully tied up with fixing old problems on the Astute class subs and Type 45s while trying to build the new frigate force and new Dreadnought class subs. Getting a load of human resource to build a new nuclear missile would be hard work.