Sterling has strengthened against the euro as expectations of higher UK interest rates collide with growing uncertainty across European financial markets. On October 20, the pound reached its strongest level against the single currency since May 2025, with the exchange rate trading around 83.95 pence per euro (after a low at around 83.89). The currency was mostly supported by UK labour-market data that reinforced expectations of a Bank of England (BoE) rate increase on November 5.EUR/GBPDaily Chart - Source: TradingViewHowever, the pound'sadvance is not simply a reflection of improving UK economic fundamentals.Political unrest in France, rising European sovereign borrowing costs andsurging energy prices are also shaping currency markets. With money marketsalmost fully pricing in a 25-basis-point BoE rate hike, the key question iswhether sterling can extend its gains or whether expectations have already gonetoo far.BoE Rate-HikeExpectations Support Sterling, but the Labour Market Sends Mixed SignalsThe latest UKemployment figures have strengthened the case for monetary tightening, althoughthey do not provide an unequivocal signal that the economy can withstand aprolonged cycle of rate increases.Annual growth inregular wages reached 3.7% in the three months to August, exceeding economists'expectations of 3.6%. The unemployment rate also edged down to 4.7%, its lowestlevel since mid-2025, while preliminary payroll estimates suggested that employmentconditions may be stabilising. These developments followed a run ofstronger-than-expected UK economic data.Employment Rate and Wage Growth in the UK - Source: ReutersFor the BoE, thecombination matters because persistent wage growth can contribute to domesticinflation, particularly if labour costs remain elevated. If policymakersbelieve that inflation will stay above their 2% target for longer thanexpected, tighter monetary policy may be necessary.Markets have respondedaccordingly. Money-market futures were almost fully pricing in a 25-basis-pointincrease at the November 5 meeting, which would lift the Bank Rate from 3.75%to 4%. Investors were also anticipating further increases into 2027, althoughexpectations for a sustained tightening cycle remain less certain. Higher expected UKinterest rates can support sterling by improving the relative return availableon pound-denominated assets. However, the latest employment report contains animportant counterpoint.The number ofvacancies fell to 691,000 in the July-to-September period, its lowest leveloutside the pandemic era since 2014. The decline suggests that businesses,particularly smaller firms facing higher employment costs, remain reluctant torecruit. The Officefor National Statistics also reported that payroll employment remainedweaker than a year earlier. This creates a gapbetween market expectations and the underlying economic picture. Wage growthand falling unemployment strengthen the argument for a November rate increase,but declining vacancies point to fragile labour demand.The data thereforeprovide a stronger case for a possible near-term hike than for assuming thatseveral additional increases will necessarily follow. If the BoE raises ratesas expected but signals caution about subsequent decisions, some of sterling'smonetary-policy support could fade.European PoliticalTurmoil Adds to the Euro's VulnerabilitySterling is alsobenefiting from pressure on the euro, as investors reassess the political andfiscal outlook across Europe.France has become aparticular source of concern. Renewed demonstrations and unrest have added touncertainty surrounding the government's ability to pass its 2027 budget andaddress the country's sizeable deficit. At the same time, French government bondyields have approached levels last seen in 2002, while the spread betweenFrench and German 10-year yields has widened significantly. These developmentsmatter for the single currency because persistent sovereign bond-market stresscan undermine confidence in the eurozone's economic and financial stability. Ifinvestors begin to demand higher risk premiums across several member states,concerns about financial fragmentation could intensify. Of course, France'sdifficulties should not be treated as an automatic signal of a wider eurozonecrisis. The implications for the single currency will depend on whetherpolitical and fiscal pressures remain concentrated in France or spread to otherEuropean markets.For the GBP/EUR, thedistinction is important. Sterling can appreciate because investors become moreconfident in the UK outlook, because they become less confident in theeurozone, or through a combination of both.The Oil Shock CouldComplicate the BoE's Next MoveThe Middle Eastconflict introduces another variable that could reshape the outlook forsterling and the euro: energy prices.Brent crude climbedabove $111 per barrel on October 20, reaching its highest level since May, amidpersistent disruption risks around the Strait of Hormuz and limited progresstowards ending the conflict. The prospect of further interruptions to energyshipments has kept markets concerned about supply and inflation.Daily UK Oil Chart - Source: ActivTradesFor the UK, higher oiland gas prices could push inflation higher through transport, household energybills and business costs. If these pressures persist, the BoE may face greaterdifficulty bringing inflation back towards its 2% target, strengthening theargument for higher interest rates.That could initiallysupport sterling, particularly if investors expect the BoE to tighten policymore aggressively than the European Central Bank (ECB). Yet the relationshipbetween energy prices, interest rates and currencies is not straightforward.Higher energy costsalso reduce households' disposable income, squeeze corporate margins andpotentially weaken economic growth. If the shock becomes sufficiently severe,markets could begin to question whether further monetary tightening woulddamage the UK economy rather than simply contain inflation.The BoE has alreadywarned that prolonged energy-price volatility could make inflation morepersistent and increase the likelihood of further tightening. Its Septemberdecision left Bank Rate at 3.75%, while acknowledging the risks arising fromthe conflict. The ECB faces a similar dilemma, although the consequencesdiffer according to each economy's exposure to energy imports, inflationdynamics and fiscal position.The key risk forsterling is therefore that the energy shock initially supports rate-hikeexpectations but eventually undermines the growth outlook. If markets begin tofocus more heavily on the economic damage, the pound could lose some of itscurrent advantage.Can GBP/EUR Extend ItsRally?The outlook for theGBP/EUR will depend on whether the BoE delivers the expected rate increase andhow policymakers assess the risks beyond November. Three scenarios stand out.Sterling could extendits gains if UK inflation remains persistent, the BoE raises rates and Frenchpolitical uncertainty continues to weigh on the euro. A further widening inexpected UK-eurozone interest-rate differentials could provide additional support,although much will depend on how much tightening is already reflected in marketprices.The currency paircould consolidate if the November hike is delivered but the BoE signals thatsubsequent decisions will depend on incoming data. With vacancies falling andhiring demand remaining weak, policymakers may be reluctant to validateexpectations of a prolonged series of increases. If European market tensionsalso ease, sterling's relative advantage could diminish.The euro could recoverif energy prices retreat, political risks in Europe subside or markets reassessthe expected pace of UK monetary tightening. A deterioration in British growthprospects could also undermine sterling, particularly if higher energy costssqueeze household spending and corporate profitability.For traders, thedistinction between the expected November decision and the outlook for rates in2027 is important. A widely anticipated rate increase may provide limitedadditional support if it is already priced into the GBP/EUR evolution. Futureprice movements could depend more on the BoE's guidance, inflation data anddevelopments in the Middle East.Sources: Reuters, The Wall Street Journal, ONS, Bankof England, Yahoo Finance The informationprovided does not constitute investment research. 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