Ash,

From your pictures it seems you were in the wrong lane if you were intending to go round to the right. You also mentioned using the front brake. Is it possible you realised you were in the wrong lane, leant over a bit too far to try and get into the correct lane, lost traction, panicked, touched the front brake and then went straight on to hit the curb?

Edit: Sorry, I have just realised I'm reading your key as the intended route. Forget the above lol.