From moving trains and lighting carriages to making sure we can charge our phones, the railways need power.  But the kind of power used by the railways has changed over the years.  Bex and Dan find out more.

<p>From moving trains and lighting carriages to making sure we can charge our phones, the railways need power.&nbsp; But the kind of power used by the railways has changed over the years.&nbsp; Bex and Dan find out more.</p>

We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.

<p>We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.</p>