Earlier this year Dave G8KBB gave a talk at the club on how to make a VPN server out of a Raspberry Pi.
It was based on an article published by BBC Click.
The original article has a few errors in it so here are an annotated version of the original and a copy of the slides from the WARC talk.
Below are two versions of the instructions on how to do it. The first one includes tweaks for the software as of April 2020; the other one is the first version I did that includes change bars for alterations to the BBC original. I did not keep change bars in the latest version as it was getting too messy.