(Sharecast News) - London's FTSE 100 was up 0.1% at 8,439.32 in afternoon trade on Wednesday.

Shares in credit-checking and data giant Experian surged after the company delivered annual results at the top end of expectations and guided to an acceleration in top-line growth for the coming year.

Tobacco giant Imperial Brands gained as it reiterated its full-year outlook despite a fall in interim profits and sales.

Engineering firm Spirax-Sarco was in the black as it maintained its guidance for organic sales growth this year despite ongoing weakness in the wider market, though foreign exchange headwinds will impact profits more than previously thought.

On the downside, Burberry slumped as it warned of a challenging first half after slowing demand hit annual sales and profits. The luxury fashion brand said revenues in the year to 30 March fell 4% to £2.97bn. On a constant currency basis, revenues were flat, while like-for-like store sales fell 1%.

Burberry said a "robust" first half, where comparable store sales had sparked 10%, had been offset by a more challenging second half, when they fell 8%.

Compass Group also fell even as the catering firm lifted its 2024 underlying operating profit growth guidance.

FTSE 100 - Risers

Experian (EXPN) 3,755.00p 8.21%

Imperial Brands (IMB) 1,972.50p 5.00%

Spirax-Sarco Engineering (SPX) 9,695.00p 4.70%

Vodafone Group (VOD) 76.22p 4.01%

SEGRO (SGRO) 920.80p 3.72%

Persimmon (PSN) 1,458.50p 3.55%

Fresnillo (FRES) 594.50p 3.30%

Centrica (CNA) 143.40p 2.87%

Flutter Entertainment (DI) (FLTR) 16,330.00p 2.87%

Barratt Developments (BDEV) 509.00p 2.64%

FTSE 100 - Fallers

Burberry Group (BRBY) 1,125.50p -5.30%

Compass Group (CPG) 2,236.00p -3.66%

B&M European Value Retail S.A. (DI) (BME) 528.60p -3.65%

Ocado Group (OCDO) 360.20p -2.60%

St James's Place (STJ) 485.40p -2.29%

Pershing Square Holdings Ltd NPV (PSH) 4,062.00p -1.74%

Barclays (BARC) 213.75p -1.59%

Tesco (TSCO) 310.60p -1.05%

Associated British Foods (ABF) 2,691.00p -1.03%

Frasers Group (FRAS) 817.00p -1.03%