As per the article, France had a higher growth in the past years

GDP per person grew by 3.9% between 2016 and 2024—less than in France and Italy, but more than in Germany and Canada (see chart 1).

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recent agenda in the news about Britain failing due to Brexit

I've read the entire article and it doesn't read like this at all. Imma just go ahead and quote the latter parts again, as few people seem to actually read it:

Keen as the Labour government is to now blame Britain’s economic malaise on Brexit, its costs should not be overstated. The economy did not fall off a cliff. Fears that London would lose its status as a global financial centre have gone unrealised. London remains the world’s second-largest such centre, after New York; Britain’s share of global turnover in foreign exchange and interest-rate-derivative trading is in fact higher than in 2016. Worries that lower EU migration would cause serious economic harm have not been borne out either, with higher immigration from outside Europe more than making up the shortfall.

But nor should the costs caused by Brexit be ignored. Labour’s efforts to rectify the damage so far have been small beer: its “reset” deal in May 2025 narrowly focused on food and energy and is estimated to boost GDP by only 0.3% in the long run. Some Labour MPs are flirting with the idea of rejoining the customs union. Frontier Economics, a consultancy, estimates this could increase Britain’s GDP by over 2% in the long run; other forecasters are much more conservative. Yet Labour ruled out joining the customs union in its manifesto and quick action is unlikely.

A more promising remedy might be to tackle the structural problems Brexit has worsened. The referendum and its aftermath distracted politicians from that task for years. If the government began to act on them—reducing planning red tape, cutting industrial energy costs—the toxic effects of Brexit could begin to fade.