Some Doctor Who stories are better suited to an audio release than others, stories like 'The Massacre' and 'Marco Polo' are perfect because they are character and dialogue driven, on the other hand adventures such as 'The Celestial Toymaker' and 'The Space Pirates' are not so good, the reason being that they are too visual. There are many scenes without dialogue and require masses of narration to cover this.
The War Machines falls somewhere in the middle of these two extremes, there is plenty of speech within the story to allow the listener to follow events without the narration stating the obvious but there are also many battle scenes and the sound of the war machines themselves travelling around London making buzzing, beebing noises that are very confusing and frankly, boring. There is a scene on video of the Doctor and Ben capturing a war machine but on audio without the pictures it's just indistinct, it could be anything. This is where the narration plays a vital part because it is here that the listener's attention can wander, the trick is not to give too much away but at the same time keep the listener interested enough in what is happening until such time as the material in the story becomes self-explanatory.
This version of 'The War Machines' is interesting because it is the full length edition of the story, the adventure can never be released in full onto DVD because there are scenes missing from the archives, but the soundtrack exists in full and is of value to Doctor Who fans for this reason alone.
I agree that a DVD version would have been better, but on the whole this is not bad and is probably worth investing in.