WOOD Group has highlighted challenging conditions in the North Sea but signalled confidence in the longer term prospects for work in the area.

The Aberdeen-based oil services giant provided further evidence that moves by oil and gas firms to cut spending in response to the crude price slump are hitting the North Sea supply chain in an update on trading.

"We are seeing the impact of reduced project work and in certain cases non-essential maintenance work," said Wood Group, which is braced for a sharp fall in profits this year.

Last month the company said up to 80 onshore jobs could go in the UK under a review of operations intended to cuts costs and increase efficiency.

Noting that Wood Group is seeing a 10 per cent to 15 per cent fall in earnings this year, a spokeswoman said yesterday: "It's important to understand that these are challenging market conditions."

The spokeswoman added: " As a service company we flex our project workforce as project work increases and decreases and as a result we have lost a large number of contractors this year, plus a relatively small number of permanent staff."

On Tuesday Subsea 7, an oil services firm with a big presence in Aberdeen, announced plans to shed up to 410 UK jobs in response to the downturn.

Wood Group cut the rates paid to contractors by 20 per cent last year.

The company said yesterday it remains focused on reducing selling, general and administration costs, which it expects to cut by over $30 million (£19m) this year.

The company noted that firms are continuing to defer spending on new projects around the world and activity remains subdued.

The group's US onshore business has been hit by moves by producers in shale areas to limit production in response to the crude price fall.

However, the company said it sees longer term opportunities for its maintenance business in the North Sea in helping firms to increase the efficiency of existing assets and to manage ageing production infrastructure.

It remains confident that conditions in oil and gas markets will improve eventually.

Sector watchers have predicted strong demand for oil and gas in areas like Asia will fuel an increase in activity once current high levels of global inventories are reduced.

Wood Group said: " We now have improved visibility on customers' spending plans for the year, although market conditions remain challenging."

The company said it expects that full year earnings before interest tax and amortisation will be broadly in line with analyst consensus of $473m. Earnings on that measure were 14 per cent higher, at $550m, in 2014.

Some eight per cent of votes cast opposed the company's directors' remuneration report at yesterday's general meeting.

Wood Group employs around 12,000 people working in and offshore the UK.