Also thinking of changing car

Mitsubishi are withdrawing from the Uk market this year so i personally wouldn’t buy one. The Outlander is also a 10 year old car and there are many far better PHEV’s now on the market, including some (rare) diesel PHEV’s from Mercedes. The Sport is more of a junior Shogun. I personally would go for the Skoda or any of its VAG cousins such as the VW Tiguan or Seat Terraco. I am sure you will be inundated with suggestions. For what its worth i drive a Volvo estate diesel plug-in Hybrid, not a fan of SUV’s. 

Oooh thank you I didn't realise Mits was withdrawing from the UK - what a pity I have enjoyed the Outlanders.  Very useful information thank you.  As long as it passes it's MOT tomorrow I don't think I am in a rush to exchange since I can't get another one.  Their PHEV still only does 30 miles on one charge which doesn't seem great although OK for local shopping I suppose.  

I would go for your other choice - Lexus. Superb vehicles.

We swapped our Discovery Sport (excellent tow car) for a Volvo XC90 mild diesel hybrid last year. It tows our Coachman VIP beautifully,  appears superbly built, has a huge luggage area, is wonderfully comfortable and is much more economic than a full size Discovery which we had been considering.