They do but not enough UK customers buy them. This may be changing slowly and Diana are building on formats best suited to UK tastes according to Edgar Bros.
Personally, I think a 34 carbine with a proper moderator, kitted, in a 340 ntec style walnut stock would provide a real alternative to an HW break barrel or any hoped for Air Arms bb.
But how many of you would be prepared to dip a toe into it?