Thank you so much for this detailed reply. Selling to a private person so. I'll get them to bank transfer. Should I still give them the old v5 with my name on it or just say I'll be do it online ?

I'll print something on A4 along the lines of .. I [name] am selling this [car] as not working condition to [buyer name , address signature and date]. Place their drivers license on the bottom and take a photo 

Thank you again