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The following historical data is available from the National Archives:

To assist in the identification of TCDS the following letter codes are used:

  • BA Aeroplanes of UK design
  • BAS Airships of UK design
  • BB Balloons of UK design
  • BG Gliders of UK design
  • BG0 Gyroplanes of UK design
  • BM Microlights of UK design
  • BR Rotorcraft of UK design
  • FA Aeroplanes of Non-UK design
  • FAS Airships of Non-UK design
  • FG Gliders of Non-UK design
  • FR Rotorcraft of Non-UK design

For microlight approvals please see the British Microlight Aircraft Association (BMAA) website.