Benchmark Brent crude oil futures rose past $100 a barrel, breaching the symbolic barrier for the first time ⁠since July 24 as the ongoing conflict in the Middle East escalated, Reuters reported.

Oil majors in the UK advanced, with BP and Shell rising 1.5% and 1% respectively, with energy stocks hitting a more than four-month high.

Heavyweight banks were the biggest drag, with HSBC down 1.2%, Barclays off 1.6% and Lloyd Banking sliding 1.3%.

"Brent crude pushing above $100 a barrel has had a psychological effect on the market, pushing a hypothetical inflation worry gauge to ‘serious’ status and dragging down financial assets," said Dan Coatsworth, head of markets ⁠at AJ Bell.

Investors are closely watching a key US inflation report and economic growth data in the UK this week that could influence interest rate expectations from central banks.

Markets are pricing in a 60% chance the US Federal Reserve will hike rates next week but widely ⁠expect the Bank of England to stand pat on rates, per LSEG data.

Among stocks, Burberry slipped 2.4% after HSBC downgraded the stock to "hold" from "buy". It weighed down the personal goods sector.

Asset manager ⁠Aberdeen rose 2.2% after naming Torbjörn Magnusson, the former chief executive of Nordic insurance giant Sampo, as its chair-designate and non-executive director.

Among the midcaps, polymer maker Victrex topped ⁠the index with a 14.7% rise after raising its annual underlying profit before tax forecast.

Eastern Mediterranean-focused gas producer Energean rose 3.9% after posting a 45% jump in first-half profit.