Yup, WDW was loosely based on the events of the Iranian Embassy siege. It has been a while since I saw it so difficult to make any judgements. It may well have aged somewhat but I certainly enjoyed it around 30 years ago on VHS tape. Interesting to note that WDW starred Lewis Collins, one half of the TV CI5 pair, The Professionals. The other half, Martin Shaw, appears in 6 Days. A coincidence?
Either way, I'm a big fan of Ewan Lloyd's productions - The Wild Geese, Paper Tiger, The Sea Wolves, Who Dares Wins etc..
The Train is superb. A wonderful restoration of one of the very best war films ever made. Yes, it's also on Arrow - Arrow Academy, just a different sub-brand.