hybrid heat pump gas boiler Daikin and hot water tank (Plantation G51)

I've had this posted on For Sale sites for a while, but it isn't finding a new home there. This is a big item for Freegle, and I'm only going to let it go to someone I'm sure can properly make use of it, I won't just be taking the first offer. It has to be properly installed, and will cost money for the outside unit, too. Also, I have a busy day job, please be patient if I don't reply until the evening. Here's the ad text, happy to supply more details through the Chat.
Daikin Altherma Hybrid Gas/Heat Pump System 8 KW UK.HYBRID08B33Will work as combi for hot water, or with tank, which is also available: 210l Evocyl stainless steel single coil hot water tank (can go separately). Available for collection uninstalled with care by Daikin approved installer. Excellent condition, 18 months old, came with new build house, good replacement for a gas boiler, will work well with existing radiators. Available because replaced by heat pump only system and tank suitable for solar thermal after upgrades to house. Included: gas boiler+heat pump combo, hot water tank, control panel, full documentation. Not included: outdoor unit (already sold) R32 coolant, pipework, wiring (reused for new system). Outdoor units are available new to pair with the indoor units.