Changing a Thermostat stuck with wiring

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Uploaded pictures now i hope
 

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This is the new tbermostat
 

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Yellow from old stat to 1 in new stat
Red from old stat to 2 in new stat
Blue in old stat must be safely terminated as is not used in the new thermostat, I think you used the blue and thats what has blown the boiler fuse
 
On the old there is 3 wires and Earth. Red yellow and blue. Which colour goes to which number please
 
you are only using the red and yellow wires the earth and the neutral must be safely terminated, I have already posted what coulour goes to which number
 
Yellow from old stat to 1 in new stat
Red from old stat to 2 in new stat
Blue in old stat must be safely terminated as is not used in the new thermostat, I think you used the blue and thats what has blown the boiler fuse

Me learning: Can I just ask, why would the wires change? I thought 1 on Honeywell (live) would go to live (1) on new stat and 3 from Honeywell (switched live) to 2 (switched) in new stat?
 
why would the wires change?

There is a small advantage in putting the Load to the Common of a changeover switch and the Live to one of the contacts.

If the Live is connected to Common then when heating is not required the unused terminal becomes Live.
 
Me learning: Can I just ask, why would the wires change? I thought 1 on Honeywell (live) would go to live (1) on new stat and 3 from Honeywell (switched live) to 2 (switched) in new stat?
3 on the new stat is switched live for air conditioning, if you look closer you will see 2 has heat written on it and 3 has cool written on it, the new stat is a foreign make if it had been a new Honeywell then the numbers would probably have been the same, the numbers and colour of wires in heating controls seldom means anything, it is up to who wired it up
 
3 on the new stat is switched live for air conditioning, if you look closer you will see 2 has heat written on it and 3 has cool written on it
- yes I did see that and wondered what the cool bit was for. I was just to engrossed in the live being on a different number.
 

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