The Scottish capital's airport operators have had to apologise again following more complaints from passengers about problems including baggage delays.

Edinburgh Airport's new £25 million security hall which opened a year ago has been dogged by queues brought on by a greater than expected increase in passenger numbers.

Airport officials apologised on Twitter in response to individual complaints, offered advice and provided official complaint forms as concerns continued to be raised.

While a spokesman said delays due to the new security process were addressed with some minor queuing issues at peak times, there were still baggage issues at Scotland's busiest airport.

One traveller, Luciana Bianchi, tweeted: "Edinburgh Airport is in my top five list of most inefficient airports in the world."

In June one million passengers used the airport, up 10 per cent on the same time last year which is double the five per cent amount anticipated.

Last week airport security chief David Wilson, who earlier said the rising flow of passengers was the facility's biggest challenge, left his job by mutual agreement.

Mr Wilson, who took up the post at the same time as airport chief executive Gordon Dewar when it was bought by Global Infrastructure Partners in 2012, told a newspaper in June: "Our passengers deserve better.

"So on behalf of all at the airport, we’re sorry.

"We feel it because our security for years was the envy of other UK airports."

Mr Wilson was not available for comment.

His successor, Adrian Witherow, is due to join the airport at the end of September.

A spokesman for Edinburgh Airport said: "Whilst the issues that saw queues in the first part of the year are resolved, we still see some short queues at peak times as we would expect in this busiest of months.

"As with all transport providers and service businesses, many passengers take to Twitter to complain or compliment and we actively engage with them."

He added: "Baggage is the responsibility of airlines and their contractors.

"However, we are acutely aware that the airport receives the reputational damage when the service to passengers falls short of our expectations.

"We as an airport have been working with our airline and handling agent partners, including investing in our own staff to assist where required.

"We continue to work with them to resolve the issues that they face and ensure that all passengers receive the service that they expect."