Yes, the UK (I should have made this more explicit).
The UK's current deterrent force is currently expected to be replaced by the successor Dreadnought class [0] in the 2030s. They are currently projected to cost £31 billion (likely an underestimate) for four subs, each of which can carry 8 missiles max. Again, these are a horribly expensive way to deliver conventional explosives when we have cruise missiles instead.
https://www.royalnavy.mod.uk/news-and-latest-activity/operat...