TOPIC: With some sadness...

225/45/19 and 215/60/17 are standard size on the kadjar.. so both the same had tmps fitted so system works straight away. A local firm did the refurb at a cost of £150 and the wheels cost £100 as they we’re tatty..

I also have winter and summer set, 19 inch only, both on its own alloy rims. I got winter set as a part of a deal when bought new Kadjar. Continental WinterSport TS 830. When I bought rims, there was a few euros difference between 17 and 19 dimensions, literally. Winter set is still good for this season, for summer I bought 4 new Uniroyal tires in March, 130€ piece.
After 4 years I have 83000 km on clock, meaning around 40000 km with each set... even not expensive in 4 years period. Riding with 19 inch is far more dynamic than with 17 inch. If I need terrain capability I would certainly go for 16 inch 215/65 tires on steal rims...

Thanks everyone for the advice, gives me plenty to go back to the dealer with when I'm next in.