From the almanac (taking account of BST):
Sat 7th Aug
Low Water 0505 High Water 1142
Low Water 1718 High Water 2346
Sun 8th Aug
Low Water 0541 High Water 1214
Low Water 1757 High Water 0023
The dates are in the middle between neaps and springs, although slightly nearer neaps.
I
think these are right!!
Anyone else care to confirm? (Or differ!!)