Here you chaps, sorry for the late reply, been up on the South Downs working and have only just got in
Link to Tung Oil
http://www.amazon.co.uk/Liberon-Pure-Tung-Litre-LIBTO1L/dp/B000TAULGO, i get mine from the local hardware store as it's cheaper, Amazon just happened to be one of the first ones to com eup in the list
Info about Tung Oil from the write up on Amazon "
Liberon Pure Tung Oil is highly resistant to water, alcohol and food acids. Providing a hardwearing finish, it is ideal for surfaces such as kitchen worktops, tables and all high quality interior wood. Pure Tung Oil, with no added dryers, is a natural, non-toxic product which can be used on toys and objects in contact with food such as salad bowls etc."