Wodden floor coatings (Heavy Duty)? We live in an Old chapel. beside the orginal wooden flooring...

We live in an Old chapel. beside the orginal wooden flooring throughout the ground floor. Could you please reccomend a very thorny wearing sealer. Thankyou
(UK Preferred please)
Answers:    The varnish Texas 2 step told you about is available from a Marine supply surrounded by Southampton. This one is made by Epifanes and isn't cheap but it is probably worth it.
http://www.marineware.com/epifanes_2.asp
We had spar varnish put over one of our floors - alike product they use on the decking of ships. My kids used to roller skate over it, and the dogs run over it, and it always looked impeccable..