Hi, i'm new here so please be gentle. I want to replace my old Satchwell TLX2259 thermostat with a new smart one either Nest or Tado. I'm not a sparky by no means but i do dabble a bit with changing a socket or replacing a light fixture etc.. i've watched some video tutorials online about how the wiring goes for these new smart thermostats and it seems rather simple. I can see the thermostat is wired but how its wired is putting me off. Next to the boiler i can see there is a socket box with a cable with 4 wires coming from the boiler with 1 blue, 1 brown, 1 earth and 1 black with brown sleeve, this would be Live, Neutral, Ground and the balck with brown cover is the Switch Live? And all of these are wired in a 8 slot connector block with what i am assuing is the cable from the thermostat which has 4 wires, 1 Red with brown sleeve, 1 Yellow with brown sleeve, 1 black and 1 green, i know the black is neutral and green is ground but is i can't tell which of the other 2 is the Live and which is the switch live? Would it be easier just to get a wireless one and connect the 1 cable with 4 wires that comes from the boiler to the new wireless receiver and disconnect the other cable from the connector blocks and end the circuit and possibly if easy enough remove it from the wall alltogether?