MARK'S BLOG: Britain's Secret Seas

It was great to see a high-quality underwater-themed documentary series (there are four episodes in total) focusing exclusively on the diving around our shores. We've known for years what we have on our doorstep, but it always seemed the film-makers were tempted to look further afield for their inspiration.

I have to admit I was initially a bit dubious, as this was the same team behind Oceans, which was a bit lame, to say the least. Thankfully, they have learnt from their mistakes, and now not every dive the team do is 'extremely dangerous', when they dive with marine life it isn't the 'world's first sighting'. that sort of thing. Dive supervisor Richard Bull can't help himself try and add drama to events on a couple of occasions, but otherwise this unwarranted sort of behaviour is kept in check. Yes, I know they are appealing by and large to a non-diving market (which is great, as hopefully it will tempt lots of people to try UK diving, particularly if the glorious weather continues), but the spectacles on show (baskers, spider crabs and ruddy huge wrecks in the first episode) don't need any embellishment - they are cool just as they are.

So remember to tune in next Sunday for episode two, you won't be disappointed (I have seen master copies of all four episodes and they are all equally watchable).

Good work, BBC!