FTSE 100 marks worst week of year amid tariff whiplash

March 7 (Reuters) - British stocks ended mostly lower on Friday, as gains in heavyweight oil and gas company shares were offset by worries about the impact of U.S. trade policies on global economic growth.

The blue-chip FTSE 100 .FTSE ended flat but posted a 1.4% weekly drop, its biggest so far this year.

The midcap FTSE 250 index .FTMC dipped 0.2%, and recorded its third consecutive week of declines.

Investors were on edge after the latest flip-flop in U.S. trade policy, when President Donald Trump suspended tariffs on Canada and Mexico on Thursday that he had imposed only two days earlier, driving up market volatility.

Meanwhile, a bond selloff sparked by Germany's plan for a massive shift to higher spending eased on the day, with the UK's 10-year government bond yield GB10YT=RR pulling back from a one-month high.

The UK's oil and gas sector .FTNMX601010 gained 0.9% after the Russian Deputy Prime Minister suggested that OPEC+ could reverse its output increase after April. O/R

Heavyweight Shell SHEL.L and BP BP.L gained about 1% each.

Schroders SDR.L fell 5% reversing some of Thursday's 12.6% gains, as the British money manager unveiled plans for cost reductions.

Burberry BRBY.L tumbled 6.8%, dragging down the personal goods sector .FTNMX402040, as worries about the economic impact of tariffs weighed on Europe's luxury stocks.

Just Group JUSTJ.L slumped 9.6% after the insurer missed estimates for pre-tax profit and tangible net asset value.

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