According to Official Guinness Records,
The fastest time to stack a 10 large brick right angle LEGO® tower is 17.93 seconds and was achieved by Ektoras Crisp (UK) in London, UK, on 6 October 2018.Ektoras achieved the record at a Guinness World Records event at KidZania, in Westfield, London.
For a complete list of 2018 records, please visit 2018 Guinness Records in United Kingdom.