Hi, Long story, made contact with a cousin who had an old ladies handbag containing some old photos, but no idea who they were. He was very kind and emailed them to me and I have been able to identify some of them. Katherine Marshall was our great grandmother born Hetton le hole, Durham, her husband Frederick Charles Watts died in 1920 in Darlington, so we assume that they lived there for some time before he died, hence the reason why we're looking at Darlington.
I can't see any badges, but the apron is definitely 'nurses uniform' the dress appears to be plain fabric rather than stripped, white collar, long straight sleeves, hem is halfway between ankle and knee, black stockings and shoes. The hat is for 'outdoor use' its black and I can't see one like it on any of the searches of nurses uniforms.
regards carolmc