Best courier company?

i was working last week for them, and carrying parcels, so were the other couple of riders to my knowledge.

Well, I got the following PM from one of their riders on Thurs AM:

Hey, I've called you twice this morning. Just wondering if you are working and need any cover today at all? I'm in Clerkenwell and addison lee aren't taking any bike bookings at all today. Just seeing if you guys are down on riders? Let me know.