Store sales at Next have returned to growth after a weather-hit slump earlier in the year, the clothing retailer revealed today.
Shares jumped 5% as the company also lifted its profits forecast for the year amid a stronger-than-expected improvement in performance.
But the company said trading "remained volatile" throughout the latest period.
Sales in the third quarter to October 26 were up 4.3%, just above the top end of an improvement of 1%-4% expected for the second half.
The figures included a 10.7% increase in the Next Directory catalogue and online division.
Retail stores managed to increase revenues by 0.4% - despite a stock blunder following the summer heatwave that left Next short of warm weather fashions in August.
The rise comes after sales fell 0.9% for the first half-year to the end of July, which included a dip during a period of freezing spring weather.
Next said overall sales were up 3% for the year to date, including 1.9% from new openings.
Weekly sales charts for the latest period showed the most dramatic fluctuations in September, with two weeks seeing takings up more than £10 million compared with last year and a fall of nearly £6 million in another seven-day period.
Next said it expected to earn between £650 million to £680 million over the 12-month period, an increase from its previous guidance of £635 million to £675 million.
Profit before tax coming in at the top end of the new range would represent a 9.4% rise on last year.
The group trades from more than 500 stores in the UK and Ireland and nearly 200 outlets in more than 30 other countries.
Cantor Fitzgerald analyst Freddie George said the latest sales improvement was "a positive surprise given the warm weather".
The mood elsewhere in the sector is less buoyant, after CBI figures earlier this week indicated that shoppers reined in their spending this month to leave sales broadly flat after a three month growth spurt.