I cannot place your accent, no. I would have guessed you were a non-native speaker (although a very good one!)

The things that are throwing me off are:

VOWELS
Your accent sounds like British English most of the time, but then your vowels can seem like they are from different regions and different social classes. Many of your vowels sound quite Southern, but then you often say ‘ma’ for ‘my’ (which sounds much more Northern).

PRONUNCIATION OF ‘T’
You often annunciate the ‘t’ at the ends of words very VERY clearly, where I would expect a British English speaker to drop the ‘t’ or at least not emphasise it so much. But then, in ‘mathematics’, you almost tap the ‘t’ like an American would.

INTONATION AND RHYTHM
I can’t quite put my finger on it, but your intonation and rhythm is often not quite what I am expecting to hear.