Fault code P2C7B - new sensor?

Hi,

recently my car has been throwing code P2C7B.
Did some searching and i think that one of my oxygen sensor is shot.

Would this be the correct part for me?
http://www.bestpartstore.co.uk/1149292

I do think that the sensor is for bank 1 - not sure if they are different for bank 1-2.
but i see some off them have different lengths.

Thanks for any help in advance.