Sadolin varnishes are not cheap, but they are such good quality that it is worth paying the extra. I am using both interior and exterior on a small wooden chalet in a ski resort in France; sun and snow in abundance! Easy to use and a super finish on all types of timber. The best.
Saddling has reliably given me a coat of solid protection on woodwork throughout the house and has shown no sign of yellowing on oak doors and fitted furniture. It has been easy to apply and cleaning equipment is just as easy.