https://www.solvite.co.uk/en/products/repair/wallpaper-repair-adhesive.html
currently making some headway with this - wet the area, peel it back a bit, squirt this in - so far so good but we've not painted yet
That looks perfect, thanks for pointing me in the right direction.
@iamalex started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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https://www.solvite.co.uk/en/products/repair/wallpaper-repair-adhesive.html
currently making some headway with this - wet the area, peel it back a bit, squirt this in - so far so good but we've not painted yet