McKenna made her debut for the England national team in August 2011 in a 15–11 victory over the United States.

[5] In 2015, she was also part of the team to finish third in the first round of the Rugby Europe 7s Grand Prix, but was forced out for nine months due to an ankle injury.

She was also selected for the England squad playing in the Rugby World Cup Sevens in San Francisco that year, in which the team placed ninth.

[8] She was named in the England squad for the delayed 2021 Rugby World Cup held in New Zealand in October and November 2022.

She is Head Coach for Old Albanian RFC Saints women's rugby team based in St Albans, Hertfordshire.