I m so great full you are helping but this drawings not clear to me. I don't want do something wrong again. Could you explain over the pictures I sent you? Many thanks. I really appreciate.
123 would not be used on the timer. Follow the diagrams and try to understand why. You're just guessing otherwise. The timer has a hot water time control which is undesirable. It won't be used. You should keep the stat by wiring it in series as above. It will be fed from timer, not from boiler.
You have been great help so far. I will try to understand what you put so far and then I would do the connections
It has time control and terminals for just heating, not hot water. You have a combi boiler, so no need to control hot water times.
Thats a strange diagram, they want you to pinch a feed from the L&N terminals for the time clock electrics but take a permanent live feed from 3 for the switch contact in the timer and then take the neutral for the thermostat to 5. Why not just show everything connected to 34&5.
I have drawn what you suggested but I m stuck with room stat. Where it goes the cables were 3/4 before?
To be honest, your best bet would be to replace your existing room stat with a programmable stat. Loads on Screwfix. http://www.screwfix.com/p/horstmann-centaurstat-7-room-thermostat/12157 No rewiring of boiler needed.
To be honest this is what I wanted first place and I got myself in this mess. This link product you put above ,is it replacing the room stat button? I might give this c27 back and get the one in the link. Is it easy to install?