Two Lords committees have attacked the poor quality of the Government’s response to their report raising concerns over Theresa May’s approach to Brexit, saying it lacked “rigour and analysis”.

The cross-party group of peers said the official ministerial response to their report, which pointed to gaps in the Government’s approach to Article 50 talks and post-Brexit trade, was undetailed and repetitive.

It comes amid warnings that Ms May is stirring resentment at the way she is treating parliamentary procedure and following claims that Whitehall is unprepared for the Brexit process.

The EU External Affairs and Internal Market Sub-Committee’s report Brexit: the options for trade sought a series of clarifications from the Government on its approach to the European Economic Area, trade, Ireland and the European Court of Justice.

But after reading the Government’s reaction to the report, it wrote back: “We are disappointed …at the quality of the document, which the Sub-Committees felt was often repetitive.”

It added: “A number of the responses did not address the issues raised by the Sub-Committees, and in other cases points were not addressed with the appropriate level of rigour and analysis.

“This suggests that the Government is not taking our concerns, or those of our expert witnesses, as seriously as it should.”

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The report went on to say there was “disappointingly little detail” in the Government’s response on the issue of how Brexit will affect the border with Ireland, and how problems might be resolved.

Ms May found herself fighting a court battle after seeking to trigger Article 50 without consulting Parliament.

She was told by Supreme Court judges that she could not use the Queen’s powers to take Britain out of the EU and would need legislation, but was then later accused of seeking to bully MPs and peers into allowing her Article 50 Bill to pass unamended – she even took the unprecedented step of going to the Lords to watch the debate from the floor of the Chamber.

How Brexit affected Britain's favourite foods from Weetabix to Marmite Show all 8 1 /8 How Brexit affected Britain's favourite foods from Weetabix to Marmite How Brexit affected Britain's favourite foods from Weetabix to Marmite Weetabix Chief executive of Weetabix Giles Turrell has warned that the price of one of the nation’s favourite breakfast are likely to go up this year by low-single digits in percentage terms. Reuters How Brexit affected Britain's favourite foods from Weetabix to Marmite Nescafé The cost of a 100g jar of Nescafé Original at Sainsbury’s has gone up 40p from £2.75 to £3.15 – a 14 per cent rise—since the Brexit vote. PA How Brexit affected Britain's favourite foods from Weetabix to Marmite Freddo When contacted by The Independent this month, a Mondelez spokesperson declined to discuss specific brands but confirmed that there would be "selective" price increases across its range despite the American multi-national confectionery giant reporting profits of $548m (£450m) in its last three-month financial period. Mondelez, which bought Cadbury in 2010, said rising commodity costs combined with the slump in the value of the pound had made its products more expensive to make. Cadbury How Brexit affected Britain's favourite foods from Weetabix to Marmite Mr Kipling cakes Premier Foods, the maker of Mr Kipling and Bisto gravy, said that it was considering price rises on a case-by-case basis Reuters How Brexit affected Britain's favourite foods from Weetabix to Marmite Walkers Crisps Walkers, owned by US giant PepsiCo, said "the weakened value of the pound" is affecting the import cost of some of its materials. A Walkers spokesman told the Press Association that a 32g standard bag was set to increase from 50p to 55p, and the larger grab bag from 75p to 80p. Getty How Brexit affected Britain's favourite foods from Weetabix to Marmite Marmite Tesco removed Marmite and other Unilever household brand from its website last October, after the manufacturer tried to raise its prices by about 10 per cent owing to sterling’s slump. Tesco and Unilever resolved their argument, but the price of Marmite has increased in UK supermarkets with the grocer reporting a 250g jar of Marmite will now cost Morrisons’ customers £2.64 - an increase of 12.5 per cent. Rex How Brexit affected Britain's favourite foods from Weetabix to Marmite Toblerone Toblerone came under fire in November after it increased the space between the distinctive triangles of its bars. Mondelez International, the company which makes the product, said the change was made due to price rises in recent months. Pixabay How Brexit affected Britain's favourite foods from Weetabix to Marmite Maltesers Maltesers, billed as the “lighter way to enjoy chocolate”, have also shrunk in size. Mars, which owns the brand, has reduced its pouch weight by 15 per cent. Mars said rising costs mean it had to make the unenviable decision between increasing its prices or reducing the weight of its Malteser packs. iStockphoto

When Conservative peer Michael Heseltine said he would vote against the government on two amendments, which sought to guarantee the rights of EU citizens in the UK and give Parliament a say on the final deal, he was sacked from his job advising ministers on devolution.

Meanwhile, ex UK Ambassador to the EU EU Sir Ivan Rogers quit his job after despairing at “muddled thinking” in government. He also shone a light on the strain Brexit is putting on Whitehall.

He said departments had failed to maintain reports to his team as they struggled to cope with the prospect of Brexit and keeping up on its potential implications.