Not sure if you have done this or not, but if you Google 'mazda cx 5 towing mirrors uk' one of the first posts that comes up is one from caravan talk Sep 2016, it has some good photos on it of what the CX5 owner has used.
I can't put a link to the post as it's one that UKCS does not like.
------------- XVI yes?
As well is two words!
How does a sage know everything about everything? or does he? or does he just think he does?
Remember, if you buy something you bought it, not brought it.
I have a 2016 CX5 2.2 auto (great towcar) and use Colt caravan mirrors, due to the shape of the car mirror housing they are a bit fiddly to fit securely but I have had no problems with them.
Towsure have a wide selection of towing mirrors also, they have a store in Shefield
http://www.towsure.com/catalogsearch/result/index/?dir=asc&order=price&p=2&q=mirrors
Will have a look at them,thanks,tried to put the Milenco grand aeros and with that awkward lip underneath it was just pushing the extensions off,very strange but they are great towing mirrors,thanks for all the replies.
------------- We ain't much money but we do see life!!!