Ah! But him not got noe visible race number, innit.
Lack of paper and thick marker pen. Seemed to work well enough with the RFID on my helmet though.
Or, more critically, barakta knows who you are.
This isn't a scalable solution, as it depends on whoever's frantically banging numbers into the babbage-engine to know what people's numbers are when the tags don't work, which is easy enough when you discover that a specific individual has duff tags, but becomes a lot trickier when they whole system fails and you've got to try to keep track of everyone's laps on a Mk 1 piece of paper.
It also can't be relied on when you've got half a dozen interchangeable MAMILs in helmets and glasses on the same type of machine...
But I now seem to have lost the helmet in a house move 
unless my son's taken it to Cornwall or just possibly it went to the Bike Project with a load of other stuff.
All you need is an Impinj-compatible RFID reader and you can track it down...
(While doing
SCIENCE with the timing system the year before last, I discovered that it will pick up the read-only tags in various Decathlon products in and about your house, and if you turn the gain down and point the aerial around you can triangulate them.)
