We have the same problem here in the US. Non stop rain and flooding.
What I would do for now til the sun comes out is get one of those full spectrum lamps sold..-- they sell them in some health food stores, and there are some you can order online . I have a floor lamp version that cost 49.99 if you cant find them, do a Google search and type in "Full spectrum lamps" in the search engine.
Shut your eyes and stare at it with your eyes closed. Keep it on when you get home from work- and it will increase your seritonin levels and fight Depression also!.