Pat, that looks like an ordinary "spade" crimp connector pair. Probably a 1/4" wide male end & corresponding female. They should be available just about anywhere. These have a Nylon shroud to provide insulation.
Thank you for the responses. I've found lots of spade collectors but none with the thick clear vinyl cover that waterproofs the connection (my middle pic). An internet search indicates several in the UK and I've placed an order there.