<p>On Wednesday 25th April, we're attempting to visit all 270 stations on 250 miles of the London Underground network in the fastest time possible. The world record is 16 hours and 29 minutes. We probably won't beat that, but we'll give it our best shot.</p> <p>We're fundraising for Jimmy's Night Shelter, a "Cambridge-based charity that provides emergency accommodation for those who would be otherwise be homeless" and does amazing work. If we reach our fundraising target of &pound;1000, we can provide a bed, dinner and breakfast for 21 people for a night.</p> <p>Donating through JustGiving is simple, fast and totally secure. Your details are safe with JustGiving &ndash; they&rsquo;ll never sell them on or send unwanted emails. Once you donate, they&rsquo;ll send your money directly to the charity and make sure Gift Aid is reclaimed on every eligible donation by a UK taxpayer. So it&rsquo;s the most efficient way to donate - I raise more, whilst saving time and cutting costs for the charity.</p> <p>Please give as much as you can, it might be fun to sponsor us per station on the network, so 5p per station becomes &pound;13.50, say. Thank you so much.</p>