Regarding Service Records, these are available from Kentigern House, Glasgow, Next of kin charge is £30 & a few years ago, i waited over 1 year for my late Dad's, But we have just applied for my late Brother in Laws & been notifed it could take approx 6 months wait now.
Re, WW2, POW's, we applied to the ICRed Cross @ Geneva, {they have a website} & filled in the online form with what we knew about my Br in Law & they replied, because my Wife was seeking info on her Brother, the search was free, & they told us it could be a long wait! We got a letter back within 1 week, with his POW info & where he was captured, treated, Stalag Camps & when he was repatriated. Well worth a try & no charge, but i felt a small donation to them very worthy. Mixerman