Mission accomplished, alba. Bonjela Gel bought. Shall report back, probably tomorrow, to give the gel time to do its stuff. Just in case anyone else is thinking of trying Bonjela, please note:
there is an Adult version as well as the teething gel version. Both packets look similar, so ensure that you don't buy the Adult version. That is for mouth ulcers that are caused by rubbing, from dentures, braces, and so on. That isn't what my wife has got, so it's the teething gel (15 grams for £2.50 in Tesco) that's needed for wisdom teeth. Thank you once again, alba.