According to Official Guinness Records,
The fastest time to prepare three envelopes is 36.14 seconds and was achieved by Ruairidh Forbes (UK) on the set of Blue Peter, in Salford, UK, on 6 September 2018.Ruairidh works in the letter and badges department of the British TV show Blue Peter, responding to the thousands of letter received every year by the show.
For a complete list of 2018 records, please visit 2018 Guinness Records in United Kingdom.