In their debut season as an international partnership, the pair headed to Sheffield fresh from winning bronze at last month's Berlin Open.
The duo opened up at Ponds Forge with a score of 83.700 after the technical duet, putting them second with Canada five points ahead.
However with Canada opting out of the free duet the path was clear and Randall and Clark made the most of it, scoring 84.920 points to finish with an overall score of 168.620.
And despite not having the chance to leapfrog Canada on merit the pair, who were part of the British team that finished sixth at London 2012, were more than happy with their weekend's work.
"It felt like a really good strong swim [in the free duet]," Randall said. "It was quite tiring compared to the first day but I think we did a really good job. It was a good result for us.
Clark added: "We improved on Germany [Berlin Open] and we got better scores from the Tech duet so that’s good."
- Sports & Recreation