What's on Events People of the Industry breakfast Treat yourself to a delicious full Cornish breakfast at Wheal Martyn where you’ll be joined by our knowledgeable volunteers who have worked in the china clay industry, before they lead you on a fascinating guided tour of the historic china clay works. Price: £25 per person (£15 for annual pass holders). Booking is essential. Price includes a 12-month annual pass. Contact: [email protected] Manage Cookie Preferences