Wales' lost mines: 'We're the first in there for 200 years'

Ioan Lord is rediscovering Wales' lost mines.

Their existence and whereabouts have been forgotten about for hundreds of years.

He believes there are more than 1,000 mines in mid Wales alone - and he's been in up to 400.

Once, while exploring a flooded Victorian mineshaft with an underwater drone, Ioan discovered an entire tramway of intact rail carts and equipment.

"It was like seeing the Titanic for the first time," he recalled.