Originally Posted by
IO540
Thank you for that, BT. Unfortunately, the paper contains a load of
formulae, and when I graduated (in the days of big collars and flared trousers) I swore I would never look at another formula

....and when I quit the Met Office, I swore I would never look at another tephigram.
if e = esw - 0.000646p(t - t')(1 + t'/1167) and you have an overdraft then go and find a more lucrative job.