Oil prices have climbed sharply, with Brent crude trading around $108 a barrel, following new attacks on Saudi Arabian and Iranian ships in the Gulf and the shutdown of Saudi Arabia's East-West oil pipeline. This surge, which saw oil close last week at $104.61 after an 8.6% rise, has heightened concerns about a fresh inflation shock ahead of critical meetings by the Bank of England, the U.S. Federal Reserve, and the Bank of Japan.

The closure of the East-West pipeline, a vital route for Saudi exports that bypasses the Strait of Hormuz, threatens up to 4% of global oil supply. Analysts note that these developments indicate a worsening geopolitical situation and a breakdown in negotiation attempts.

"Oil markets are being subjected to their worst fears all at one – attacks on energy infrastructure, the closure of Hormuz and a breakdown in attempts to restart negotiations," said Chris Beauchamp, chief market analyst at IG.

The rising energy costs pose a significant challenge for the Bank of England, which is set to convene its Monetary Policy Committee this week. While markets currently anticipate the bank will hold interest rates steady, growing concerns suggest a series of increases may follow.

Motorists are already feeling the pinch, with petrol prices reaching a four-year high last week according to the RAC. Energy bills are also expected to rise, with forecasts predicting an additional 18% increase in January, according to E.ON.

The prospect of escalating prices has triggered a sell-off in the bond market, pushing borrowing costs higher. The yield on UK 10-year gilts rose to 5.390%, and 30-year gilts increased to 5.94%.

Traders are now anticipating up to five quarter-point interest rate hikes by this time next year, bringing rates to between 4.75% and 5%, a notable increase from the two or three hikes priced in earlier this month. Economists, however, suggest that while a November rate hike is not impossible, it is not guaranteed, particularly if inflation remains largely confined to the energy sector.

Economists at ING stated that rising natural gas prices present a "serious headache" for the Bank of England but noted "very little sign that inflation is broadening out beyond energy." They maintain a base case that the bank will keep rates unchanged into next year, with potential for rate cuts in 2027 if energy prices stabilize.

Meanwhile, the European Central Bank recently raised its base rate, and markets are pricing in a nearly 90% chance that the U.S. Federal Reserve will implement a rate hike this week, potentially signaling the start of a renewed tightening cycle.

Bank of England Governor Andrew Bailey has previously signaled concerns about rising inflation, citing increased "upside risks."