With base layers, mid-layers, oilskins, boots, gloves, hats and scarves, it takes a good 20 minutes to get kitted up to go up on deck.

BBC: Braving the elements

We have national parks to provide access to these kinds of areas, but that does mean that people will effectively go for a walk in the park without perhaps doing the preparation work, getting kitted up, learning the necessary skills.

BBC: 'You must prepare for the hills'

The traditional method of repair involves a gang of up to five people kitted out with shovels, buckets and wheelbarrows, and a lorry-load of asphalt.

BBC: Jetpatchers at work