This page on the CAFOD site gives more details:

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Run to the beat
September 25th 2011
Minimum sponsorship £200, entry fee £35
Join us! Guaranteed places available

"Run to the rhythm, run to the beat, keep your feet moving, and pound that street” - all while helping communities living in poverty across the world. This is London’s biggest half marathon, and 2011’s event is set to be even more popular than before, with exciting news soon to be announced by the organisers. Beginning and ending in the shadow of London's famous O2 arena in Docklands, the half-marathon course is lined with musicians playing to keep you on the move.

CAFOD will have guaranteed places in 2011’s Run To The Beat, and we would also love runners with their own places to join our team. To apply for a CAFOD place, please fill out our short online form. You can apply for your own place in the run by entering the ballot - if you are successful you can still join the CAFOD team making us even bigger and better. Register your interest for the ballot here. When completing your own place application please select CAFOD as your charity of choice – this way, if you secure a place in the run your name will automatically be passed on to us.

Do something amazing. Take part in this ever popular run and we will be supporting you all the way! Whether you gain your own place in the race or would like a CAFOD charity place, we will provide:

• Your very own CAFOD running vest.
• Training schedules and top tips to suit your running pace.
• A fundraising pack, sponsorship forms and your own fundraising web page.
• Team CAFOD e-newsletters.
• Lots of support in the lead up to the day.
Runners must be 18 or older on Sunday 25th September 2011.