Dibies question raises a question: his former school recorded flight time (training) using Hobbs but his current school uses hours and minutes recorded using a chrono. Am I correct in saying that the UK CAA accept a maximum of 15 minutes (or 18/0.3 if we're being pedantic) taxy time for each sortie? i.e. a 1:30 logged lesson cannot contain 1:00 taxy time as is allowed by the FAA. Recording training time without regard for taxying time (as implied by measuring the hobbs duration in a flying logbook) surely gives the student a significant disadvantage over the former with respect to the amount of actual airborne time? I've flown from U.S. airports where taxy time was considerable and would have been of little value to a student.
I don't recall anything in JAR-FCL concerning the recording of training flight time and can't see anything in EASA-FCL's. Was this only a UK thing?