Paxboy
easyJet started this before Ryanair and it is available to just the first 20 pax per flight.
Once at the gate, customers will be boarded according to priority;
• Wheelchair passengers and convicts
• Speedy Boarders (SBs)
• Pre-boards (PBs)
• Boarding group A
• Boarding group B
• Boarding group C
• Boarding group D