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Questions over Jeremy Corbyn’s wreath-laying trip to Tunisia intensified today after he admitted staying at a five-star hotel.

The Labour leader checked into Le Palace for two days while he attended a conference on the political situation in Palestine.

His flights, accommodation and meals were paid for by the Tunisian government which he did not declare in the register of MPs’ financial interests.

Labour claimed the £660 threshold for declaring the 2014 trip would not have been breached. Critics said it seemed “inconceivable” that such luxury would have cost so little.

Le Palace, overlooking the Gulf of Tunis in the Mediterranean Sea, describes itself as the “jewel” of Tunisia’s business hotels. It has 239 rooms and 44 suites, with its restaurants and bar “designed to combine business and relaxation in the greatest tradition of luxury and elegance”.

It boasts three pools, including “one of sea water for freshness enjoyment”, a spa and fitness centre.

Top-end suites cost up to £1,000 a night, although Labour said Mr Corbyn’s room was much cheaper.

The Evening Standard attempted to book a bargain package using budget travel sites on the internet today, but failed to find any prices as low as £660.

A return trip to Tunis, setting off next week and coming back a week later to take into account Mr Corbyn’s apparent holiday, came in at £548 on SkyScanner, a website that searches dozens of airlines for the best deals.

To obtain this price Mr Corbyn would have suffered the discomfort of a 2.15am return flight to Stansted and he would have had to leave from Gatwick and make two changes of plane on the way out, taking 17 hours.

Travel website Trivago found a room at Le Palace for two nights from tomorrow for just £139, including breakfast. The total came to £687 and did not include lunches, dinners and airport transfers.

A Labour Party source would not give details of Mr Corbyn’s flight times but insisted it was possible to put together a similar package on the internet for under £660, including meals.

Critics also claim that tourist prices in the north African country have fallen since the terror attack on a Tunisian beach in 2015.

Mr Corbyn today insisted he had not broken any rules.

Asked why he did not declare the trip he said: “It was a perfectly public trip and I made that clear at the time. It was under the threshold that was required to declare.”

Asked why he did not declare hospitality paid for by the Tunisian Government he said: “I didn’t declare it because it was under the required level to be declared but I made the trip absolutely public.

“I made public the fact I was proud to go there in order to promote a Palestinian peace process and indeed it was an all party parliamentary delegation that attended, there were liberal democrat and conservative Parliamentarians there as well and many people from other parts of Europe.”

Conservative deputy chairman James Cleverly scoffed at the party’s claim. “It seems inconceivable that a multi-day trip like this could come in below the declaration threshold,” he said. “All MPs have a duty to disclose hospitality like this. If Mr Corbyn made an error, I think he should have the courage to say so.”

The row over the price of the trip will increase the pressure for a full investigation into whether Mr Corbyn broke parliamentary rules.

Two formal complaints have been made to the Parliamentary Commissioner for Standards since this newspaper revealed yesterday that he was facing an investigation.

The row started with allegations that he laid a floral tribute for Palestinian terrorists linked to the 1972 Munich Olympics massacre — an allegation the Labour Party vehemently denies.

Today Labour’s biggest Jewish organisation backed an investigation by the commissioner.

Ivor Caplin, chairman of the Jewish Labour Movement, said: “We need complete transparency around this trip by Mr Corbyn. That doesn’t seem to be forthcoming at the moment.”