LONDON: Fears that Britain will end its post-Brexit transition period without agreeing any trading arrangements sent the pound to 5-1/2-month lows on Friday, overshadowing data showing the economy recovering and news of a new trade deal with Japan.

The pound is set for its worst week against the euro and the dollar since mid-March, when the Covid-19 pandemic sell-off was at its height, having lost around 4% against both currencies.

"GBP has really underperformed this week as we expected due to tensions in talks", wrote Jordan Rochester, a foreign exchange analyst at Nomura. At 1500 GMT on Friday, the pound was down 0.3% against the euro at 0.9255 pence and 0.2% to the dollar to $1.2782.

"For now the UK and EU are at a stalemate with time working against them, no deal is a real possibility and 1.20 in GBP/USD or 0.98 in EUR/GBP are still very possible if a no deal Brexit were to happen", Rochester predicted.

Reports that Brussels has stepped up planning for a 'no-deal' Brexit after Prime Minister Boris Johnson's government refused to revoke an ultimatum on breaking the divorce treaty kept the pressure on sterling.

"We are going to wait for the reaction of the United Kingdom by that deadline (end-September) and we will consider next steps once we have reached that particular bridge", European Commission spokesman Eric Mamer told a news briefing. Meanwhile, analysts remain broadly pessimistic for the coming days.