Hi Simon,
Welcome to THP from another UK grower. Are you keeping a glog (grow log) this year? Be good to see your progress if you are.
The top plant, going by the fruit it has produced looks like it could be some sort of bird's eye pepper, may be a demon red. The 2nd plant looks like some sort of Aji or Facing Heaven type of pepper. I'm no expert though so don't take my word for it, I'm sure someone on here will know what they are straight away if I'm wrong.
Where/who did you get them from? Do they have any info on them?
Cheers
Pete