Hi Nobby.
This works-I`ve tried it in the past over the winter months. Slugs hide there from the cold. You will find that the satisfying method will gradually reduce the numbers `till there era none. Let us know the numbers - interesting.

I've had some success with kebab skewers from underneath.  Make sure the soil is moist, it helps unglue them

Cumberland pie with pots and creamed leeks with a side spoonful of Stokes red onion marmalade. That's me sorted.

Sounds like a modern hybrid that can also be grown as a climber like my Gertrude Jeykll. You may lose some flowers but it shouldn't kill it.

I once grew them but they weren't that prolific. May I recommend Elegance as a big fruiter with a great taste. There's also Marie du Bois which is also a good one. I have both here.