The Nimrod is an anti-sub aircraft built from the DeHavilland Comet airliner. It has incredible range and loiter time combined with a relatively high speed and a good weapons load.
It is not a strategic bomber. The last British strategic bomber, the Avro Vulcan was retired shortly after the Falklands war. If the Brits have deliver nukes they rely on Posidon missiles and Tornados.
Lord God, our power evermore,
Whose arm doth reach the ocean floor,
Dive with our men beneath the sea;
Traverse the depths protectively.
O hear us when we pray, and keep
Them safe from peril in the deep.
Agreed, Prayer for the safe return of all of gods children!
Only nukes in the UK inventory are with the Royal Navy Trident SLBM fleet. The RAF did away with all nukes back in 1998. The last aircraft to be assigned this role was the Tornado.