Media playback is unsupported on your device

What causes sinkholes and why has Britain seen a spike?

18 February 2014 Last updated at 23:07 GMT

Geologists are warning that the prolonged flooding and wet weather will lead to more sinkholes appearing across the UK over the coming months.

At least six are known to have opened up over the past month, including a 5ft hole that appeared under a house in Ripon on Monday night.

The BBC's Science Editor David Shukman assesses how and why the sink holes form.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.