Higher fuel prices and the Gatwick drone incident hit easyJet in the first half, but the airline said it is on course to deliver annual profits in line with expectations.

The group reported a headline loss before tax of £275 million for the six months to March 31.

Revenue was up 7.3 per cent to £2.34 billion, due to capacity growth and favourable foreign exchange rates.

But growth was held back by the timing of Easter, as well as comparison to last year when Monarch's bankruptcy and Ryanair cancellations benefited EasyJet.

Total revenue per seat decreased by 6.3% to £50.71.

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Chief executive Johan Lundgren said: "We have also continued to make good progress on our strategic initiatives in holidays, loyalty, business and with data."

Amazon is to invest £450 million into food delivery app Deliveroo.

The internet retail giant is among the companies to have backed the service in a funding round, alongside existing investors T Rowe Price, Fidelity Management and Research Company, and Greenoaks.

Will Shu, founder and CEO of Deliveroo, said: "This new investment will help Deliveroo to grow and to offer customers even more choice, tailored to their personal tastes, offer restaurants greater opportunities to grow and expand their businesses, and to create more flexible, well-paid work for riders.

"Amazon has been an inspiration to me personally and to the company, and we look forward to working with such a customer-obsessed organisation."