Got it!

The practice nurse said to take 2 puffs of my becotide inhaler but that didn't work so I tried 3 ,that didn't work either . Then5, no good then 7 and yes it worked1I was getting out of breath, every 2nd step while I was walking I had to stop for a breath but now I can walk my usual pace without getting out of breath and I have no pain in my legs. My inhaler is 50 mcgs which is a child's dose , 7 puffs is 250 mcgs which is what most people are on.
 I was talking to a friend across the road yesterday who used to have asthma and she suggested her nearby practice which has an asthma clinic. I will go down there tomorrow. I can't go today as it's Easter bank holiday Monday.