Hundreds of jobs at 10 Homebase retail stores across the west of Scotland are under threat after it was announced a quarter the firm's UK stores are to close.

Workers at stores in Pollokshaws, Robroyston, Milngavie, Irvine, Ayr, East Kilbride, Hamilton, Wishaw, Greenock and Dumbarton all fear for their jobs.

The Kilmarnock store has already closed down and is being replaced by Plymouth-based retail group The Range which is to open at the end of the month creating 100 new jobs.

Owners Home Retail Group, which also owns sister company Argos,  made the announcement that it planned to shut 80 of its 323 stores by 2018 as it confirmed its half-year results.

A Homebase spokesman said: “The result should be a more efficient and productive estate that can support future investments”.

Homebase currently employs 17,000 people and has around 32 stores in Scotland. It is already shutting 30 in the current financial year.

A review was launched as the threat of online rivals and the rise of a generation “less skilled in DIY projects” threatened a sector already squeezed by the economic downturn over the last few years.

It found Homebase was saddled with “inconsistent store operating standards” as well as “a large estate with low sales densities that result in a challenged financial model”.

A shake-up will aim to improve product availability and presentation and instil “a culture of both efficiency and great customer service in stores” and will also see it take advantage of online technology developed by Argos.

The announcement came as the group’s half-year results showed that though sales and profits were rising at Homebase, earnings growth was lagging behind that of Argos - itself undergoing a shake-up - where they soared by 57%.

Group chief executive John Walden said Homebase would launch a three-year plan “to improve the productivity of its store estate, strengthen its propositions and accelerate digital capabilities”.

“This will position Homebase as a smaller but stronger business, ready for investment and growth,” said Mr Walden.

The group said: “Following the completion of the Homebase business review, Paul Loft, managing director of Homebase, and the group have agreed that now would be an appropriate time for Paul to step down from his role.”

Details of the store closures emerged as the group reported a 13% rise in its headline “benchmark” pre-tax profit to £30.9 million for the half-year to August 30.

However, reported pre-tax profit fell 5% to £13.5 million after taking into account costs of a plan to transform Argos plus the effect on the bottom line of property provisions and currency movements.

Shares fell 3% as analysts said profits were at the bottom end of expectations.

Group sales increased by 3% to £2.67 billion, with like-for-like sales up 2.9% at Argos and 4.1% at Homebase.

Argos saw sales from mobile and tablet devices rise by 45% as its benchmark operating profit soared by 57% to £12 million.

Homebase was boosted by a strong performance from seasonal products in the first quarter during the spring, while “big ticket” items such as fitted kitchens and bathrooms also did well though other categories were flat.

Benchmark operating profit grew by 2% to £27.8 million.

Mr Walden, the former Argos boss who was promoted to lead Home Retail after long-serving chief executive Terry Duddy stepped down earlier this year, said the group had performed well.

“Argos continued to build on its sales growth from the previous financial year, increased its benchmark operating profit, whilst also making good progress with its transformation plan.

“Homebase delivered a good peak trading period, performing well throughout the half despite being up against the tough comparators of a strong second quarter last year.

“At this mid-way point in our financial year, we continue to expect to deliver full-year benchmark profit before tax in line with current market expectations.

“However, as always the full-year outcome will depend upon the important Argos Christmas trading period.”