Winter Fishing

Hi Can anyone help as to the best ways to catch pike and barbel this winter. I am fishing the Thames at Sandford Lock. I fish near and sometimes on the wierpools. http://maps.google.co.uk/maps/mm?ie=UTF8&hl=en&ll=51.710727,-1.233623&spn=0.002407,0.004807&t=h&z=18. That is the link. Any tips would be greatly appreciated!

Thanks