Ex-Prime Minister Tony Blair and his wife Cherie received tens of thousands of pounds in discounts on designer clothing while in Downing Street, documents show.

Between July 2001 and December 2002, Mrs Blair bought clothes worth more than £75,000 – equivalent to £150,000 today – but paid just £31,000 for them, newly released papers from the National Archives suggest.

Downing Street officials were worried these benefits would have to be declared under a new ministerial code, which was then coming into effect, and advised the Blairs to repay thousands of pounds.

It is not clear from the papers if this happened.

From fashion designer Nicole Farhi alone, Mrs Blair bought clothes worth nearly £21,000 for herself and the prime minister, paying just over £8,000.

She also had substantial discounts from Burberry, James Lakeland, Ungaro, Joseph, and Maria Grachvogel, amongst others.

These "wholesale" discounts had been negotiated by Carole Caplin, Mrs Blair's trainer and personal shopper.

Sir Tony, who was prime minister between 1997 and 2007, also benefited from a 25% discount from Paul Smith, famous for his suits.

The freshly released documents reveal how the optics of the discounts and spending was a concern for Downing Street officials at the time.

"In terms of public perception," wrote No. 10 private secretary Clare Sumner, "the amounts involved are quite large".

Along with the cabinet secretary, she recommended that the Blairs should pay back part of the discount, though Cherie was entitled to divide her purchases into two, on the basis that half the clothes were required for her role as a "career woman".

They would say the Blairs had "commercial terms" from the designers, which were usually a discount of about 10 or 15%.

She suggested other options, including saying that Mrs Blair had the same treatment as other high profile individuals with a personal shopper, and that she needed the clothes for public engagements of her own.

She said Mrs Blair sometimes gave her outfits to charities or exhibitions after use: "So it is difficult to see how anyone could seriously allege she is acquiring a clear personal benefit out of your position as PM."

According to the memo, the discounts had been in place for several years, and dated back to before Sir Tony was prime minister.

Sir Tony himself scrawled "Speak to me" on the memo, dated 19 February 2003. Later that day, Mrs Blair spoke to Ms Sumner.

Her note to the cabinet secretary, dated 4 March 2003, says Mrs Blair agreed to speak to Paddy Campbell, Paul Smith and Nicole Farhi to "ask them to set out in writing their terms of trade, confirm that these terms are available to others (with personal shoppers or as individuals) and to provide an estimate of the numbers of people who bought their clothes in a similar way".

She would also confirm that "confidentiality agreements" were in place with these designers.

The intent was to "satisfy" Sir Andrew Turnbull, the cabinet secretary, that "no preferential treatment had been given".

There is no mention of gifts of clothes discounts in the ministerial gift list in the file – which was published on 14 March 2003.

On behalf of the Blairs, the Tony Blair Institute said: " We have nothing to add to what has already been disclosed which shows that advice was sought and followed."

As prime minister, Sir Tony received some extremely generous presents from famous people and world leaders.

U2 lead singer Bono had given him a guitar – as had Bryan Adams.

Silvio Berlusconi, the then Italian prime minister, offered multiple designer watches, including timepieces from Piaget, Corum, Jaeger-Coultre, and Cartier.

The prime minister asked Ms Sumner to make the list "more boring" – so the published version did not include the type of watch, which can retail at many thousands of pounds each.

She wrote: "I have taken out details of individuals, removed the valuations for all items except those which have been purchased and minimised the descriptions of items."

The concern over discounted clothes has similarities with criticism faced by Sir Keir Starmer and his wife. Last year he accepted more than £18,000 for spectacles and work clothing from the Labour peer Lord Alli, who also paid for some clothes for Sir Keir's wife Victoria worth just over £6,000.