London equities began the week on a softer footing as investors paused after a sustained rally and reassessed corporate and economic signals ahead of key UK growth data. The FTSE 100 declined 0.4% to 10,862.50, while the FTSE 250 fell 0.4% to 24,744.54 after both indexes recorded their fourth consecutive weekly gains on Friday.

FTSE 100 Takes a Breather After Four Weeks of Gains

Monday’s decline represented a modest retreat rather than a reversal of the broader market trend. The FTSE 100 had completed four straight weeks of gains, while the FTSE 250 reached a record closing high in the previous session. The pause therefore comes as investors assess whether recent momentum can be sustained against a backdrop of economic uncertainty and company-specific pressures.

Sector performance was mixed. Energy stocks gained about 1% as oil prices rose sharply following renewed uncertainty over the reopening of the Strait of Hormuz. The move provided support to energy-related shares and partially offset weakness elsewhere in the market.

Imperial Brands Leads Declines as Cost Pressures Return to Focus

Imperial Brands was the FTSE 100’s biggest decliner, falling 4.6% after a Bloomberg News report said the tobacco company was preparing to cut thousands of jobs in key markets as part of efforts to reduce costs. Rival British American Tobacco also fell 4.4%, indicating that the pressure extended beyond a single company.

The reaction highlights how investors are weighing efficiency measures against potential concerns about underlying operating conditions. Cost reductions can strengthen profitability over time, but substantial workforce reductions can also signal that companies are seeking to protect margins in an environment where growth remains uneven.

Other individual stocks also influenced the session. Vistry plunged 12% after the Financial Times reported that credit insurer Allianz Trade could reduce the cover it provides to the homebuilder’s suppliers by as much as 70%, potentially increasing pressure on its cash flow. Plus500 moved in the opposite direction, rising 2.1% after reporting higher first-half core profit, supported by stronger trading activity.

UK GDP Becomes the Next Major Market Test

The immediate macroeconomic focus is Thursday’s UK GDP release. Economists expect the economy to have expanded 1.1% on an annualised basis in the second quarter, with lower energy prices potentially contributing to growth. Stronger-than-expected retail sales in June, helped by warm weather and World Cup-related spending, have provided an additional indication of consumer resilience.

For global investors, the GDP figures will help clarify the balance between economic growth, corporate earnings and monetary-policy expectations in Britain. A stronger result could support confidence in UK assets, while a weaker reading could increase attention on the resilience of domestic demand and the outlook for interest rates.

Looking ahead, Thursday’s GDP figures will be the central catalyst for the UK market, alongside movements in oil prices and developments surrounding the Strait of Hormuz. Investors will also be watching whether recent strength in economically sensitive sectors can offset renewed pressure on companies facing cost or financing challenges. The ability of the FTSE 100 and FTSE 250 to maintain their broader upward momentum after four weeks of gains will provide an important indication of whether the current rally has further room to develop or is entering a more selective phase.