Sorry to hear the sad story. But there is always hope. Start taking 5000 UI vitamin D daily and buy 10K LUX lamp which you should use for 1 hour a day minimum.

Sorry to hear the sad story. But there is always hope. Start taking 5000 UI vitamin D daily and buy 10K LUX lamp which you should use for 1 hour a day minimum. London is a gloomy city, overcast most of the time (from what I remember). Most of us are Vitamin D deficient (dwelling all day) and lack at least 1 hour of direct sun light. This affects our mood (leads to SAD) and spirals into depression. Get a blood test to confirm vitamin D deficiency if you need the additional data / motivation. Before making any major decisions like quitting jobs or similar address your body's biological needs to balance it out. And then when in good spirit and mind make the right decision.