Just a little update, I binned the rectus fittings and bought a brass reducing pipe connector from eBay and joined the pole hose to hose reel permanently. 

Joined with a couple of o clips , which looks like this - so I can just wind it all on the hose reel. 

I had the problem of the pole hose getting quite twisty so had to fit an equal straight push in fitting 

Cost around £4.50 and should last quite a while, a lot cheaper and more robust than the rectus fittings and doesn’t disconnect at all  👍