I lost my peak flow from years ago (which I only know was well above predicted because the nurse erroneously told me I didn't have asthma). So, at my new surgery I stopped avoiding reviews and my PEF was 420, though I'd taken near maximum ventolin.
Anyway, a few weeks later I scored 440 but none of my other scores were that high, so instead it was based off the other higher score I'd got - 430.
Two weeks ago, I was feeling well and my PEF was easily 430-390 but I'd run out of pages in my book, so I recorded none of it. On Monday, I scored 450 and started recording using an app.
It's not a huge jump, but it would push a number of my scores from the green band to amber. On the other hand, I've got enough oxygen and such.
It's gradually gone back to about 370-340. I think this might be because I was away last week and unfortunately I think I'm irritated/allergic to the flat we now live in. I've not been as low as 300 in about a month.