Enter the 2011 #cometojump competition!

JUMP London is in its second year, we're onto the fourth issue of the JUMP magazine and now we want to know what's stopping you from becoming all joined-up. We have assembled a lovely prize package worth £5,000+ for you and your colleagues to win.

To be in with a chance of winning just tell us, via a single tweet on Twitter, what your biggest challenge to joined up marketing and PR is. Use the #cometojump hashtag so that we can track your entry.

The winner will be picked using random.org and will receive a joined-up package including:

• A Panasonic Lumix GF3 camera
• Two free passes to JUMP London
• An Econsultancy Platinum membership
• An Econsultancy training day of your choice
• Opportunity to blog about JUMP on the Econsultancy blog

Entries will be accessible via the tweet stream on this page.The final deadline is 12 September - exactly one month before JUMP London.

So, let the joined-up conversation begin... tell us about your biggest challenge!