Well found Dave
Being very much from that part of the world (albeit many years back) I have vague memories of the Swift (which is still visible on Google Earth but I belive it was sold about 5 years ago and has gone), but for some reason the Spit didn't ring a bell at all.
For the Google spotters it's about 600m SSE of where Google Earth thinks "Upper Hill Leominster" is, at roughly N52 deg 10'37" W002 deg 46'33". It also looks from street view as if the Spit has been replaced by a light tank!!!!!
For some reason pprune won't let me imbed the link to a piece which covers this story, but googling "thunder and lightning leominster swift"..will find it..
BTW in passing it's pronounced "Lem-stir" by the locals, callingl it "leo - min- stir" can get you some odd looks.........
