Verenti Technique 2015 - Crankset upgrade My verenti road bike (Wiggle own brand) has an unbranded crankset which I am thinking of upgrading to a Shimano 105. Does anyone know if I will need to change the bottom bracket as well ?
It being an "unbranded crankset", I don't think anyone here could tell you that.  May be a good idea to change it anyways, as usually complete bikes are specced with the cheapest compatible BB, and as that is one of the prime spinning parts of your bike, upgrading it even a little usually goes a long way.