There is nothing more of an affront to your status as a Londoner than knowing about a place but never having been there. Postcard Teas is one of those places for me. It's been around about as long as I've lived here and I've heard it referred to in hushed tones amongst those in the know but didn't even realise it was an actual shop (you can order teas online too). In fact, this is one of those shops that people travel specifically to London to visit. It's not on a street that you may walk through regularly so stumbling across it as you search for a less congested route through the city (as I did on a wretched tube strike day) gives it an added aura of magic. It had actually started to tip it down as I arrived in what looks like a gallery space. The shopkeeper, taking pity, offered to make me a brew so I could sample my selected tea until the rain had passed. I've recently developed quite a taste for Pu-erh tea and discovered that trading in these leaves is a little bit like being part of a secret society. They come in different vintages according to age but for my entry level tastebuds I bought a caddy of Mr Liu's Nannuo Shan Cooked Pu-erh. Now you know about it--go visit.