I found the answer. You have to click the jigsaw when it appears and tell it to enable Flash for each site. Kinda stupid but at least it works.
Latest w10 and edge upgrade specifically aims to stop flash on websites unless you click the jigsaw icon (just left of the star and book in the top right ribbon) and enable for that site.
It is a MS decision not an Adobe error.
The jigsaw only appears if edge is blocking flash.
Enabling flash in settings does not prevent this happening.
MS Edge - such a great browser but now impossible to do internet banking with HSBC that insists on Flash - and the secure link means the jigsaw does not appear to enable it.