Assuming the snow melts then my top tips for the solo boulderer based in Rusland would be:
Eskdale - Rob's Wall and Strong Arete. Possibly Diamond Reign, although a spotter would be good.
Duddon Valley - Once Upon a time in the West and variations. Make sure you take Greg's video. It's 7B with the beta and much harder without! Fantastic problem if not snowy. Screwball Scramble a bit further up the hill is also worthwhile.
Fleswick Bay and boulders. The Trash Vortex is great fun and the circuit of 7s on the boulders beyond the bay is really good. Excellent landings but needs a mid to low tide.
If you go to Trowbarrow then Texas Hold 'Em is excellent.
If WOTR is dry (should be)then there's shed loads to go at there. Angel Deelite (all 3 finishes), Turbulence, Paroxysm (hard!), Super Star DJ... are the classics.
Farleton - The Coil, New Rose (2 pads) and The Wrath of Khan.
Should keep you busy for a few days!