Trains can travel faster and more efficiently if they’re electric – but how do you electrify the network?  And why can it take time to do so?

<p>Trains can travel faster and more efficiently if they&rsquo;re electric &ndash; but how do you electrify the network?&nbsp; And why can it take time to do so?</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>