Here's the problem.......

I have a oil fired burner heating the rads and hot water cylinder in my house (new self build house). The house heating is divided into 4 zones - Hot water, downstairs rads, upstairs rads and kitchen rads by 4 motorised valves. These valves are actuated by four switches located in the kitchen. I should also mention that the only room thermostat that I have is in the kitchen which will close the motorised valve when it gets to temperature.

So if I wanted HW and the kitchen warm for the morning I have to make sure before I go to bed that the two motorised valves are left open.

The problem that I have is what would happen if the heating was turned on and the only motorised valve open was the one in the kitchen? As far as I can make out the thermostat will close the motorised valve and the the heating pump will keep pumping but the water will have nowhere to go.......

What would be the best solution to this?? I've thought long and hard and the only ideas that I can come up with is ..... (bear in mind that I'm new to this)

A: Wire the power for the boiler through the motorised valves, if they're all closed then the heating will switch of.
or
B: Build in a by pass on the plumbing, but I'm not sure how this will work either. Do I need to add pressure switching valves or what???????

Any help much appreciated