All comments noted, thanks. The CAA NPPL pages gave me the answers I need (tnx bern444).
But no one has confirmed that £180 is average. I'm committed to this year's anyway, now, but will be taking a long hard look before this time next year at downgrading to NPPL. Retirement is a double edged sword - before retirement, money and no time, after retirement, time and no money....
RF