To be fair, I didn't sweat this ...
Waterproofs 1.2kg (cheap and heavy)
Electronics 1kg (incl heavy wind-up LED torch, heavyish GPS and batteries)
Multitool penknife, cathole trowel, bog roll, meds, toiletries etc 1kg
Fleece, walking trousers, hat, espadrilles (for keeping the B&Bs' carpets clean), gloves, socks (2pr), pants (2pr), tees (2) 1.6kg
Maps, guidebook, remaining odds and ends 1kg