Up to 900 jobs could be at risk at Ryanair amid a drop in earnings as the airline faces higher fuel costs.

Chief executive Michael O'Leary told staff in a video message that the airline will do its best to minimise job cuts, but some were "unavoidable".

Ryanair is being hit by delays to expansion plans forced by the grounding of Boeing's 737 Max jetliner.

It is believed details of redundancies will be given by the end of August, with any cuts to be enforced later in the year.

READ MORE: Ryanair posts 21% profit drop

Ryanair indicated earlier this month that it would trim operations, saying it expected to get no more than 30 of the 58 Max jets due from Boeing by next summer.

The airline this week reported a 21% fall in quarterly profits as overcapacity and a price war in Germany drove ticket prices lower.

House-builder Taylor Wimpey reiterated warnings over rising build costs as it reported a drop in half-year profits.

Shares in the group fell 5% after it posted a 9.4% drop in underlying pre-tax profits to £299.8 million for the six months to June 30 as rising build costs took their toll.

On a statutory basis, pre-tax profits were 0.4% lower.

Taylor confirmed warnings made earlier this year over a hit to profit margins in 2019 from forecasts for build costs to rise by around 5%.

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It said: "In this environment where pricing is flat, and there is increased build cost pressure, our margins will be lower in 2019 than in 2018."

But it stuck by its full-year forecasts and said that, despite Brexit uncertainty, it had not seen "any meaningful" hit yet to home-buyer confidence.

The group is also expecting full-year house sales by number to be "slightly higher" than in 2018.

BAE Systems has reported a 9% increase in underlying earnings to £999 million in the six months to June 30.

Group sales rose to £9.4 billion, up from £8.8 billion. The defence giant reaffirmed its guidance for the full year, though said it now expects net debt for 2019 to be unchanged rather than increasing.

It upped its dividend to 9.4p from 9p this time last year.

Chief executive Charles Woodburn said: "The first-half performance underpins our guidance for the full year, with improvements being made on a number of operational fronts."

Shares were up 2% at lunchtime on Wednesday.