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Top 3 British Growth Stocks To Watch In October 2026

The IMF has warned that the global economy is nearing its limits of resilience, with growth and inflation pressures concentrated in a smaller group of countries. That raises the bar for finding businesses that can grow earnings without leaning on cheap debt or heroic recovery stories. This article highlights three United Kingdom high growth potential stocks identified using a rigorously filtered screener that focuses on both earnings momentum and financial health.

The three stocks highlighted here offer a compelling starting point if you want exposure to healthy high growth potential businesses that also meet clear balance sheet checks. However, if you want the strongest names, these 6 best high growth potential stocks are the top of the list.

Saga (LSE:SAGA)

Overview:Saga is a United Kingdom group focused on insurance, cruises, holidays and personal finance products tailored for people over 50.

Operations:Saga generates about £282 million from Travel Ocean Cruise, £194 million from Travel Holidays, £144 million from Insurance Broking and operates entirely in the United Kingdom.

Market Cap:£1.1b

Saga taps into the Healthy high growth potential theme through its insurance arm, where pricing, claims control and cross-sold finance products are expected to drive earnings rather than a simple bet on travel demand.

"Demographic tailwinds from an aging, affluent over 50 population may encourage excessive capacity additions in river and ocean cruising. This could leave Saga overexposed if tastes shift toward more flexible, independent travel and could depress load factors and revenue growth."

What happens to Saga's growth profile if a single assumption about how profit is shared across key partnerships stops holding true?

That hinge point sits at the centre of the full narrative for Saga , which maps where Saga's earnings power accelerates and where partnership economics could quietly cap the upside.

LSE:SAGA Earnings & Revenue History as at Oct 2026
LSE:SAGA Earnings & Revenue History as at Oct 2026

Atalaya Mining Copper (LSE:ATYM)

Overview:Atalaya Mining Copper runs the Proyecto Riotinto open-pit copper mine in Spain, producing copper concentrates with silver and gold by-products that anchor its high growth potential profile.

Operations:Atalaya Mining Copper generates about €492.9 million from mining operations, exploration, development and scrap sales, with €454.6 million from Spain and €38.2 million from Cyprus.

Market Cap:£1.7b

Atalaya Mining Copper brings the Healthy high growth potential theme into focus, since its flagship copper operation links earnings acceleration with a balance sheet that can support expansion without stretching credibility.

"Atalaya is nearing key milestones on growth projects, notably the expected permitting and subsequent 18-month development of Proyecto Touro. This project is projected to add 30,000 tonnes of copper per year at significantly lower cash costs than current operations."

What really shapes the long term upside is how one unseen pressure on future cost levels and copper pricing ultimately resolves.

That unresolved pressure is where the story gets interesting, and the full narrative for Atalaya Mining Copper shows how Atalaya Mining Copper's growth plans could accelerate or stall as those costs and prices decouple.

LSE:ATYM Earnings & Revenue Growth as at Oct 2026
LSE:ATYM Earnings & Revenue Growth as at Oct 2026

CMC Markets (LSE:CMCX)

Overview:CMC Markets runs an online trading and investing platform, with its Trading segment driving growth through leveraged CFD and spread betting activity.

Operations:CMC Markets generates about £320 million from Trading and £70 million from Investing, with revenue spread across the UK, Australia and other regions.

Market Cap:£1.8b

CMC Markets matters for this Healthy high growth potential screen because its leveraged Trading engine links earnings momentum directly to active clients and trading volumes, while the broader investing platform gives that growth a more diversified base.

"The company's entry into digital assets, tokenization, and Web 3.0 (including its acquisition of StrikeX and rollout of multi-asset wallet infrastructure) positions CMC at the convergence of traditional and decentralized finance, giving it access to a rapidly expanding global user base and broadening its addressable market, which may support multi-year top-line revenue growth."

What really decides how far that earnings story runs is how one emerging cost and profitability pressure ultimately shapes future margins.

That margin pressure question is exactly what the full narrative for CMC Markets unpacks, showing where CMC Markets' earnings engine could keep accelerating and where hidden frictions might quietly cap the upside.

LSE:CMCX Earnings & Revenue Growth as at Oct 2026
LSE:CMCX Earnings & Revenue Growth as at Oct 2026

Seeking Alternatives Before The Crowd?

Fresh breakout stories rarely stay under the radar for long. Scan these ideas while the momentum is building and information edge still matters. Get in early.

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  • Position ahead of the next leg in metals demand by reviewing hand-picked 16 top copper producer stocks that could benefit if copper remains central to long term electrification trends.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team@simplywallst.com

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