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The FTSE 100 extended its winning run to nine, recouping early hefty falls, despite fresh problems for advertising group WPP.

The FTSE 100 index closed up just 3.92 points at 9,760.06, another record close.

The FTSE 250 ended down 171.99 points, 0.8%, at 22,276.28, and the AIM All-Share closed down 3.09 points, 0.4%, at 769.80.

WPP plunged 17% as it warned performance in the year-to-date was at the “low-end of expectations” as it cut the company’s outlook.

The London-based advertising agency firm said revenue in the third quarter fell 8.4% to £3.26 billion, and was down 3.5% on a like-for-like basis.

Revenue less pass-through costs slumped 11% to £2.46 billion, falling 5.9% like-for-like.

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