Thanks everyone !
Had a look at Op Tech Pro at Amazon - there are quite a few to choose from
The German Amazon site
I can't for the life of me figure out if any are NOT suitable. The coloured ones look quite jazzy
OK I don't speak much German and Google translate let me down.....
Here's what you want:
1. Pro strap. These are marginally more exepnixe than the fashion ones but much wider. They are more grippy than the classic. (BTW if you carry 1 or 2 cameras all day then a more grippy strap will make you siginificantly less tired at the end of the day - you aren't constantly shrugging your shoulders.)
2. With "standard" 3/8" loop connectors - these fit most modern Nikon and Canon camera (maybe all). The Pro connectors are for bodies with very small connection points like most MF cameras. The split rings will rattle a bit and can scratch your camera if you don't need them.
3. Whatever colour you fancy
Looking at the picture I'd choose this one
A reporter strap will let you carry 2 cameras from one strap but it's not as great as they make out.