Why is buying meat online so expensive I buy meat from a supermarket which is around £5-£10 per kilo for most types of meat.  At my local bucher, I buy high quality meat for ~£10/kg.  

I think perhaps online I could get a better deal, buy bigger quantities etc.  But no!  Normal online prices seem to start at £20/kg all the way up to £55/kg!  So many sites sell rip off 'meat boxes' as well.

Why is it so expensive?  I want to make regular 10kg beef orders (1 per quarter probably) to make lots of beef jerky but I just can't find anywhere online where this wont bleed my bank account dry!

Why is it so expensive online?
1) Because the meat is ostensibly higher quality and 2) because of the relatively high cost of refrigerated shipping.

Your local butcher is probably a better option for bulk buying. Tell him you plan on regularly buying a large amount of beef and he should be willing to cut you a deal. If not try another butcher!