Replacing boiler programmer - replace programmer & thermostat or go for mini HIVE standalone?

[BevanC]

I have a noisy old analogue boiler dual-channel programmer that I want to replace and I want to be sure I buy one that's compatible and to get advice on whether I need to change the wiring positions (it'd be preferable not to need to). I also have an old inaccurate analogue room thermostat.
The boiler is a mid-position valve system with gravity storage tank (not sure what make and model) with Drayton MA1 actuator and Grundfos Alpha2 15-60 130 pump. The attached pic 1 shows the wiring diagram and pic2 shows the actual wiring at the programmer back plate.
I've seen some cheapish programmers around the £50-60 mark, with a replacement thermostat around the same price, ie all in ~£100, while a mini HIVE standalone (hubless) programmer with thermostat costs ~£60. This should do the same thing right and has the option to upgrade with a hub later? The wiring diagram for the HIVE dual channel has a connection at 2 (Central Heating Off) which isn't present in my current set up. Will this be an issue, as I don't seem to have that wire?

Thanks in advance

 

[ianmcd]

the hive receiver will go straight onto that existing backplate with no wiring alterations, and just for your information you have a Y plan open vent system.

 

[BevanC]

Thanks Ianmcd!

 

[ianmcd]

with a replacement thermostat around the same price

If you have an existing thermostat you will either have to link it out or leave it at maximum and let the Hive take over