I’ve had a tow bar fitted so that I can travel out to new mountain biking locations. Unfortunately, I tend to get pretty muddy and sweaty

Can anyone recommend any cheapish washable seat covers to protect my lovely leather?

I use Titan ones for garage trips. Easy on and off-able
www.titancovers.co.uk
Check they do them for your model though  Visitor from fullfatrr.com
* GONE. 2012 RR Sport HSE SDV6 Orkney Grey. Now being piloted by RRSTDV8
* Current: 2011 4.4 TDV8 Full Fat. Amazing piece of kit.
* Current. 1974 Lightweight 2.25L petrol. Old skool
* GONE. Freelander GS TD4 Manual MY2013. Orkney Grey with privacy, cold and clearview packs, armrests (a must!) and a spoiler.
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* 1949 80" in family since 1975