I can highly recommend Top Signal, after they came last week to sort out our home wifi coverage. We had 2 total blackspots and poor performance pretty much everywhere beyond the living room where the main router is. Apparently common in houses with extensions, due to the metal joists. Dan was responsive from our initial contact, quickly coming to do a site inspection and then providing a quote within 24 hours. Then was available within that week to complete the job. Really focussed on giving us the solution we needed, but no more (no overkill). We now have 100Mb+ in every room and 40Mb+ in the garden too. Very tidy job, courteous and friendly throughout. Charged exactly what was quoted, which was reasonably priced - and very good value for the solution we now have in place.