Help with disconnecting thermostate after installing Hive

[ChipButty]

I've just repaced my hotwater and central heating progrmmer with a Hive active heatng and hot water thermostat. It's all working but the thermostat is still connected, I've turned it up to full so it's always calling for heat but I want to put the Hive thermostat in its place so need to disconnect it..
From the wiring box it looks like I just need to disconnect the thermostat and then connect the red wire from block 3 into block 4 is that right?
Thanks

 

[James]

Remove red, yellow and blue wires to thermostat.
Move white wire from 4 to 3

This is all a guess based on the info you have provided.
Do not take as fact, check it out first.

Always isolate power before opening cover.

 

[ChipButty]

Thanks James, I'll defo turn off the power before doing anything, never had an electric shock and never want one!