A few years ago, I shared my ‘10 tips to beat those post-holiday blues’. These tips included watching a film and listening to music among others. They did not, however, include going to a festival, which I now realise was a big omission. I’m currently on holiday in Greece, but I will soon return to London, where I live. Although I’d much rather continue my holidays, there are some things I’m really looking forward to – they will certainly help bear those post-holiday blues. One of these things is going to festivals. Although the British capital is home to a plethora of various kinds of festivals, these 5 festivals in…