I'm slightly confused about what Ed Sirret told me, he said:

The sort with an indirect heating coil are the only sort that a boiler
may
heat. The boiler control system is arranged to heat either the
cylinder
and/or the radiators independently.

Does this mean the boiler will not be heating the cylinder when CH is
on?

Will any valves be needed?(2 port valves etc)


I'm planning to get the Drayton lifestyle weekend/weekday programmer,
it seems very easy to use and I also like the Advance buttons, it also
allows separate timing for CH and DHW.