- Clare Wookey, Caroline Sims, Louise Stratford, Vicki Watson, Sarah Gatland
- 28:25:00 hour(s):minute(s):second(s)
- United Kingdom (Donaghadee (Northern Ireland))
The fastest two-way crossing of the North Channel swimming in relay is 28 hours and 25 minutes and was achieved by Caroline Sims, Louise Stratford, Vicki Watson, Sarah Gatland and Claire Wookey (all UK) in Donaghadee, Northern Ireland, from 12 to 13 June 2016.
The swimming relay took place from Donaghadee (Northern Ireland) to Portpatrick (Scotland) returning to Donaghadee.