You can get a 32mm to Lead UTC, I prefer the Plasson ones.
You could do it live, if you open your 32mm at the Tee and direct it to a drain, cut the lead (get a bit wet), slip the UTC over it and tighten it.
Once that’s on squeeze off your 32mm a bit back from your Tee and push it back in.
Then tell the water board you need a new stop tap, get a bacon butty and brew on before they come.
You could do it live, if you open your 32mm at the Tee and direct it to a drain, cut the lead (get a bit wet), slip the UTC over it and tighten it.
Once that’s on squeeze off your 32mm a bit back from your Tee and push it back in.
Then tell the water board you need a new stop tap, get a bacon butty and brew on before they come.