Digging the foundations can be awkward when building an extension. Getting the digger/excavator onsite very often means using a small and under-powered machine or resort to hand digging excavation. For London, the best excavators are the mini-diggers around 1.5 tonne and not necessary 360 degree unless you are a very experienced and careful ground worker.
Excavators can be used for : Site clearance,Foundations,Levelling,Trenches, Driveways,Demolition, Drainage, Ponds, pools, patios, Hedge and tree stump removal