The network said between the start of the Iran conflict on 28 February and the day before the base rate decision, a surge in mortgage submissions pushed activity 54.3% higher than the same period a year earlier.
Stonebridge said some of its advisers worked into the night to manage demand and get cases over the line.
Clifford said the way the network’s members reacted was “nothing short of extraordinary”.
He added: “There is no doubt their commitment and willingness to burn the midnight oil saved customers millions of pounds in unnecessary interest when you factor in the volume of business they would have written in just this short period.
“It’s a great example of how advisers champion borrowers, help them navigate a complex and fluid market, and give them an edge that they would lack if they were tackling all this on their own.”
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Insight from Moneyfacts this week found that mortgage product availability had shrunk by more than a fifth as lenders repriced deals or withdrew products entirely.
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