I use a curated coffee mail order service from Pact Coffee. The company pays above fair trade rates and aspiring members of the middle classes can get their first 250g bag for £1 inc postage if they click on this link
https://www.pactcoffee.com/spread/vernon-bslvtw@em
Move quickly because they are about to up the first bag price to around £3.
I must declare an interest - my butler gets a free coffee grinder if a few more folk subscribe.
I'm currently drinking Finca La Joyeria Espresso from Columbia.