Best bike delivery firm (uk)?

Who is the best bike delivery firm for the UK?
Also do they stipulate how you pack the bike for delivery.
Any guidance appreciated.

Never had an issue with MyHermes or DHL. Used MH to deliver a frame in the UK and got a DH bike sent to me from Slovenia using DHL, both excellent service.

Its all to do with height and width measurements, go to your LBS and get a bike box and put the bike in that, easiest way of doing it