Wood burner heating for swimming pool in England

[Anonymous European]

Hello, I live in Surrey England and have a pool approx 20x10 ft, 5 ft deep (indoors). Considering a combination of Air source heat pump for summer and a wood burner for winter. Any advice/experience about the wood burner would be appreciated, especially who to purchase from, pro's/cons etc.
Alternative options also considered, can't do solar panelling on the roof as tall trees too close to the building.

Thanks
David