Front are 26 and 18 inch, 19mm top lock connector (TLC), also known as push button.
Heyner blades 028009 and 036000 with B1 connector £29.84 inc p&p.
Bosch Icon 18OE and 26OE from Amazon at £60 the pair, delivered from USA are original equipment , come with correct connector fitted.
Halfords don’t sell any that will fit according to their website. Other sites reckon my car is a 2021 model based on inputting reg number, but Subaru changed the connector for 2022 model from hook to TLC. 
Vipa website lists the wrong blades.
Try searching for push button wiper blades, you will get a good selection of makes for £3o a pair.

The Heyner blades I mentioned above dont fit out of the box, they need DENSO push tab button adapters which I have just ordered, will update this post when they arrive.

Found a set of 3 on amazon.com for £25delivered from usa, link below

https://www.amazon.com/Replacement-Windshield-Blade-Original-Factory-Quality/dp/B0C89SYNM3?th=1

To be continued