The heifer is booked in and the butcher plans to hang the meat for 21 days - although he says that if it's very lean, he may recommend hanging it for slightly shorter a time. If it's 21 days then we'd be sending packs out to arrive Tuesday 30th June. (So, assuming summer has arrived by then, it might be best to go for the 10am delivery.)
Postage and packing for 10kgs meat, packed in polystyrene with chiller strips and couriered in vans suitable for carrying perishable items would be:
Overnight courier, to arrive by 10am the following morning, £27.15. Arriving by noon is slightly cheaper, £22.45.
For collection (or very local delivery), packaging would be £6. I can do reasonably local deliveries for fuel on top (and drive a fuel-efficient car - 60mpg diesel.)