LCH, the clearing house majority-owned by the London Stock Exchange, enjoyed a "record" first half despite the UK's impending departure from the European Union threatening its dominance in the market for euro-denominated derivatives.

LCH cleared interest-rate swaps with a notional value of more than $575.8tn in the six months to June 30, an LCH spokeswoman said — a 23% increase year-on-year.