Apologies for a query I know has come up a few times in the past but
whilst all the previous topics answer some of the questions I have,
I'm still not sure it answers my query.

Currently have an oldish conventional boiler located in the kitchen.
The cistern and programmer are located together in the airing
cupboard. The programmer currently is a Danfoss FP715 Si(or variation
thereof but it seems to match my setup), on a standard wallplate, I
can set independent times for HW and CH. There is no room thermostat
(wired or otherwise) in the house. The radiators in all rooms bar
bathroom have TRV controls(bathroom rad is bypass I beleive).

Is it possible (and does it actually exist) to install some form of
wireless thermostat/programmer and retain the current functionality?
The ideal situation will be to install some form of wireless
transmitter in the hall that will act as the thermostat for the CH
(that I can program times/temperatures) but also allow me to set HW
timers from there (we only currently set the HW to be on a couple of
hours a day so I'm not sure I need some form of thermostat/temp
control for the water).

If that isn't possible the other alternative is to retain the
programmer functionality within the airing cupboard but incorporate a
wireless thermostat for the CH only. Again I'm not sure if that exists
without requiring extra wiring at the programmer which I want to avoid
if possible.

I guess my main requirements or ideals are to retain the standard
wallplate and gain some form of thermostat control elsewhere in the
house without the need for wires. Retaining the 7 day programming
capability is the other ideal due to shift work/part time work that
family members do so we have different heating profiles each day
currently.

I've seen things like the Danfoss TP7000RF but I don't think that this
retains the control of the HW from the programmer, also the receiver
looks like it won't just clip onto the existing wallplate.

Thanks in advance for any help.