The 18-year-old will be part of the 18 and under boys’ team competing in the European Summer Cup in Piestany, Slovakia in August.
Clayton is one of three youngsters selected and will be joined in the team by former national under-16 champion Jonathan O’Mara and Clay Crawford, a runner up at the U16 nationals last year.
Great Britain has been drawn into Zone D and will face competition from Bosnia and Herzegovina, Iceland, the Netherlands, Slovakia, Spain and the Ukraine.
