Certainly
Xysticus. I think
X. luctuosus is highly unlikely as there are only 3 records since 1980, and
X. robustus extremely unlikely as there is only one record since 1980 and it's nationally Scarce (Notable A) to boot!. That's not to say you could have recorded records 4 and 2 respectively!
I've not seen such a plain looking
Xysticus, as
Xysticus go. Anything would be a guess without the usual i.d. Personally I'd guess at
X. lanio, but a guess is all it is
.
No.9 Spider