Oscar as you say has to be RAC to recover car, but nothing stopping you having Greenflag Mayday to recover caravan which has no size or weight limits above being legal to tow.
Cars On Motability
2009 Citroen C4 Grand Picasso
2012 Vauxhall Antara
2013 Skoda Superb Estate
2016 Seat Alhambra
2020 Seat Tarraco
2021 Ford Kuga
2024 Nissan X-Trail left in Sep 25