Sorry I should have stated, the wallWhat do you mean basin end or in the wall ?
Sorry I should have stated, the wall
Straight CP Brass x ABS Connector | McAlpine Plumbing - https://mcalpineplumbing.com/plastic-chrome-fittings/chrome-plated-brass-fittings/straight-cp-brass-x-abs-connector/ This one?Mcalpine sell an adapter to adapt from the metal pipe to plastic waste
Reply to the thread, titled "Modern bottle traps - How to fit securely?" which is posted in UK Plumbers Forums on Electricians Forums.