I think when you look at the CS rates of an individual hospital, and compare it to national averages, there are LOTS of factors to take into account. And frustratingly, some of them may be difficult/impossible to access to the casual enquirer.
Average age of mothers makes a big difference, for example, as the CS rate tends to be a fair bit higher for women in their late 30s than their late teens. That varies a lot from area to area. I think putting it all down to lack of maternity staff won't give you the full picture.
Totally anecdotally, along the same lines as QTPie and Gailforce1 - my friend gave birth 4 weeks ago to her 1st. She had a very protracted labour (3 days), when slow progress stalled. (she wasn't given an epidural, was fairly mobile, was given syntocin, it was just one of those things). She was finally given an emergency CS when her baby's heartrate slowed dramatically.
She had a birth de-briefing last week as she felt quite traumatised by some aspects of it - particularly the fact that during the last 12 hours, when she stopped dilating at all, and was totally exhausted and in massive pain, no one came and discussed the possibility of a CS. She believes, and so did the midwife going through her notes, that it should have been carried out earlier.
The midwife doing the de-briefing told her 'off the record' that while she couldn't speak for an individual consultant, the hospital was under 'huge pressure' to bring down its CS rates atm, and she thought this was a factor. This has left my friend very angry - she feels she would have had a better overall experience and a much better recovery if hospital policy had been less 'anti-CS'.