It’s not like you can leave it in Aunt Edna’s backyard.

Britain has retired twenty nuclear submarines since 1980. None have been disposed of — repeat, none
— Read on asiatimes.com/2019/11/for-sale-used-british-nuclear-submarines/

(Surely no worries with Australian Aunt Edna’s yard?)

Britain has retired twenty nuclear submarines since 1980. None have been disposed of — repeat, none. Cost to keep in limbo is hideous but nothing compared to cost to dismantle.