It was me who had a home water birth with IV abs given during labour. I'm in Belgium,and the midwives are trained to do this, and I don't see any reason why UK midwives shouldn't be trained to do this, and I think some of them are.
The antibiotics were put in very quickly and I didn't find the drip painful or a hinderence.
My waters didn't break until dd2 was born, and the birth was very safe. The midwives were great, regularly coming back after the birth to check me and the baby, and they also gave me their home phone numbers to use if I was worried - even in the middle of the night.
The antibiotics did give me a nasty case of thrush, but I was expecting this and treated it very quickly and fortunately it didn't pass onto my dd2.
I have looked into the option of the garlic clove, and I would prefer to have antibiotics and close monitoring as I just don't like the idea of the garlic, I don't know why not. I am hoping for a homebirth this October with the same midwives.
I would have been upset if dd2 had had to have the antibiotics.