Generally, when this is discussed alongside the TV series, the film comes off worse, but I cannot agree.
I recently bought the BBC series and watched it for the first time in 40 years, and while I'm glad to have done so, it has to be said it hasn't worn well. The scenery is all studio based and cheap and nasty; the acting makes up for that in many cases but certainly not all. There is a lot more detail than most will want in most cases; episode 1 is an exception, and I learned a lot from it, but sadly it is one of the weakest episodes in many ways.
The film, on the other hand, tells its story slickly and briskly, with never a dull moment.