The last 3 issues of the magazines contain interesting period advertisements from Lillywhites, Heinke and Typhoon. The Typhoon advert shows a diver in a wetsuit with velcro fastenings costing £14 15s. The Heinke advert shows a twin set "Heinke Lung" and mentions the company's sheet-rubber "Delta" drysuit. This must have been shortly before Heinke merged with Siebe Gorman.
If you go to the main London Divers site, there's what's termed "a bit of history" at: