Help identifying vintage frame

[gpdave]

I recently purchased this 1970s vintage bicycle.
I have been told the frame looks to be of British origin.
If anyone has any insights regarding the maker I would appreciate any informaation you give.
I have attached some pics showing it apart and assembled.
Thanks
gpdave

 

[gpdave]

Re: more pics

I thought I might add a few more views to aid with identification.
Thanks to everyone who has taken a look!
BTW I have been riding it a it does ride nice.
gpdave