(Corrects paragraph 5 of the July 29 story to remove reference to Aston Martin owning the Formula One racing team)

* Company expects positive free cash flow in H2

* Shares up 3%

* Posts wider H1 loss of 285.4 mln pounds vs 90.7 mln pounds

July 29 (Reuters) - Aston Martin expects its finances to improve in the second half of 2022 after burning through tens of millions of pounds in cash earlier this year, it said on Friday, as easing supply chain snarls help boost deliveries of higher margin cars.

Its positive free cash flow forecast comes as the luxury carmaker posted a bigger loss for the first six months, marred by supply chain and logistics snags that were exacerbated by lockdowns in China, the Ukraine war and soaring costs.

Aston Martin earlier this month announced a capital raising that will see Saudi Arabia's Public Investment Fund overtake Mercedes-Benz AG to become its second-largest shareholder behind Chairman Lawrence Stroll. The cash call will help fix its debt-ridden balance sheet.

Stroll has been striving to lift margins at Aston Martin and help it become more like rival Ferrari, bringing in former Ferrari top boss Amedeo Felisa as its company's chief executive in May this year.

Aston Martin expects to sell more cars in the second half of 2022 as some supply chain snags ease and following a ramp up in production of its more profitable models - luxury SUVs DBX707, and the V12 Vantage sports car.

"We ended June with more than 350 DBX707s that we had planned to deliver in Q2, still awaiting final parts, consuming tens of millions in cash and temporarily limiting our ability to meet the strong demand we have," Stroll said.

"We have now started to deliver these vehicles in July and expect further improvements in the supply chain as we move through H2, supporting the delivery of our full year targets."

The 109 year-old firm, also known as the preferred ride of fictional secret agent James Bond, posted a pre-tax loss of 285.4 million pounds ($347.99 million) for the six months ended June 30, compared with a loss of 90.7 million pounds a year earlier.

Shares of the company, which had fallen around 65% this year, rose 3% by 0720 GMT. ($1 = 0.8201 pounds) (Reporting by Eva Mathews and Yadarisa Shabong in Bengaluru; Editing by Shounak Dasgupta & Simon Cameron-Moore)