My understanding is that in the UK, surgical spirit is the name used for what americans call rubbing alcohol. Unfortunately, that can be ethanol, methanol, or isopropyl alcohol. So the question remains somewhat.
I read somewhere that folks will even use everclear which is 90% ethanol, i believe. I ended up buying ethanol based rubbing alcohol.
The picture in Dig's article on his website shows what he's referring to which is Care's Surgical Spirits. According to Amazon, that is 90% methanol.
Care 200ml Surgical Spirit
https://www.amazon.com/dp/B0014IW3WK/ref=cm_sw_r_em_apa_i_7MeuEb594S1TP 
