He and his wife Kathleen, who are both retired, joined the Trust after their first trip to Galapagos in 2007.
'We've never won anything like this before. I can't quite believe it yet!' he said when he heard the news that he held the lucky ticket.
The couple quickly booked their dream trip for next summer.
Second prize of a two night stay at Downhall Country House Hotel in Hatfield Heath, donated by Veladail Hotels, was won by Mrs S Welford of Bury St Edmunds.
Twelve bottles of award winning Kendermanns wines, donated by Reh-Kendermann, was won by Mrs B Thomson from South Queensferry.
The selection of exotic island coffee, including some from Galapagos, went to Mr P Kerlogue from London.
Mrs V Townsend from Welling in Kent won a signed copy of Albatross: Their World, Their Ways donated by the book's co-authors, Tui De Roy, Julian Fitter and Mark Jones.
