TOP-FLIGHT stocks in London were boosted by rising oil prices in Friday trading, but observers said a recovery could not make up for the "dreadful" week on the markets.

The FTSE 100 was up 74 points, or 1.1%, at 6,778.11, regaining only some of what it lost on Thursday when £56 billion was wiped amid fears that the arrest of a senior Huawei official in Canada could reignite tension between the US and China.

David Madden, market analyst at CMC Markets, said: "Volatility is high and investors are twitchy.

"It has been a dreadful week for European markets, and today's positive move can't mask the previous losses."

The French Cac was up 0.68% but the German Dax continued its slump, falling 0.21%.

The FTSE 100 was also given a boost by oil prices after a closely watched Opec meeting in Vienna concluded with a plan to cut production by 1.2 million barrels a day.

Fiona Cincotta, senior market analyst at City Index, said this number was "much closer to what oil investors had hoped for".

A barrel of Brent crude oil was trading 4.5% higher at $62.90.

Neil Wilson, of Markets.com, said: "The cut is a real positive after some fairly tough negotiations. The fact that the Opec-Russia alliance is still holding matters as much as the details of the deal itself.

"It's probably a little better than the market had been expecting, but not by a lot. I'd still say that a deeper cut would be needed to really see oil rally back to $70."

Meanwhile, Brexit fears continued to weigh on the pound, which was down 0.44% at $1.272 despite a weaker day for the greenback. Sterling was also 0.51% down versus the euro at 1.176.

In corporate news, shares in AJ Bell rocketed on their first day of trading as the investment firm debuted on the stock exchange.

The group had initially set a price of 160p per share, but the stock opened at 162p and gained 58p to close at 220p.

Berkeley shares were in demand after the group upgraded its profit forecast, rising 35p to 3,356p.

The upgrade came after the group has repeatedly warned of a profits fall next year, having previously forecast a drop of around 30%.

There was more bad news for the high street as Primark owner Associated British Foods (ABF) warned that trading at the budget retail chain in the run-up to Christmas has been "challenging".

ABF shares closed 108p down at 2,242p.

But Games Workshop brought some positive retail news as it said sales were likely to come in 13% higher in the first half.

Shares in the Warhammer maker were 130p higher at 3,125p.

The biggest risers on the FTSE 100 were Wood Group up 26.6p to 628p, Evraz up 17.8p to 481.6p, Smith & Nephew up 54.5p to 1,475p and Anglo American up 51.4p to 1,607.8p.

The biggest fallers on the FTSE 100 were Associated British Foods down 108p to 2,242p, GVC Holdings down 13p to 669p, Paddy Power down 115p to 6,455p, and Informa down 11p to 651.8p.