"Home Radio" and Mitcham brings back memories!
Loooong ago - I lived up on Pollards Hill, Norbury S.W.16 - and weekly went to the Mitcham Ham Radio Club & also constructed items - mostly from bits acquired in Lisle Street & Tottenham Ct Road,
By 1967 I had "woken up" to the way UK was heading - so I headed out on a round the world hitch-hike, and finally, years later I ended up in Hong Kong with a HK Chinese wife!!
Been here more than 40 years and am as happy as a "Pig in shit" - with places like Aplui Street in Sham Shui Po filled with components - and then there's "SEG Plaza" in Futian District of Shumchun which is a veritable cornucopia (12 floors of components & electronic devices & has several other competing component buildings close by).
Seen flee -years ago - Aussie outlet Dick Smith in Tsim Sha Tsui "Lost face" when his sign was blown away in a typhoon - and that outlet was gone soon afterwards!