I'm sorry I can't add any more to the captions in the photos. The deep pink Geranium as well as the purplish one had finished flowering when I was last in the garden. I don't expect to return there for a few weeks.

No.1 - are the leaves dark? It could be one of the 'Reiter' series.
No. 2 - probably G. x oxonianum
No. 3. Looks like G. x magnificum from the photo and flower shape.

Sorry I'm not more definite.

Agree with Spritz on 2 and 3, but I think 1 maybe the G, Clarkei, Kaffir White.

1 Don't know
2 I agree G oxonianum and I will have a guess at one called Claridge Druce
3 I agree G magnificum

The first one is clarkei as Spitzhenry has said.

Thank you all for contributing to clarifying what the above Geraniums might be.