Carol Thatcher has thanked those who has sent her messages of support after the death of her mother Lady Thatcher.
In a statement outside her mother's former home in Belgravia she said: "this is going to be a tough, tearful week, even for the daughter of the Iron Lady."
Tory MPs have joined a campaign to get an obscure punk record about Baroness Thatcher to rival 'Ding Dong The Witch is Dead' at the top of the music charts.
Former MP Louise Mensch urged Thatcher supporters to buy the 1979 track 'I'm in Love with Margaret Thatcher' by the Notsensibles, using the 'Grantham Style' hashtag:
Downing Street has released some photographs documenting Baroness Thatcher's time in office and her lasting influence inside Number 10.Read the full story ›
Controversy over Ding Dong The Witch Is Dead has spread to Ireland, where the song has soared into the charts.
The Judy Garland track today became the oldest recording ever to enter the Irish weekly top 40, as it premiered at number 33.
It is one of a number of versions of the song making sales in Ireland since the death of Baroness Thatcher.
RTE, Ireland's state broadcaster, said it will not ban the song.
BBC Radio 1 Controller Ben Cooper defended the station's decision to play a five-second snippet of the Ding Dong song on Sunday's chart show, saying it did not amount to a ban.
"Playing the whole record would be disrespectful, but banning it is not the solution," he said.
BBC director general Tony Hall said an outright ban of the Ding Dong record on Radio 1's chart show would have given the track more publicity:
I understand the concerns about this campaign. I personally believe it is distasteful and inappropriate. However, I do believe it would be wrong to ban the song outright as free speech is an important principle and a ban would only give it more publicity.
I have spoken at some length with the Director of Radio Graham Ellis and Radio 1 Controller Ben Cooper.
We have agreed that we won't be playing the song in full, rather treating it as a news story and playing a short extract to put it in context.
The Ding Dong song from the Wizard of Oz was at number three in the UK charts this morning but could still take top spot.
The record has sold about 12,000 fewer copies than the current chart-topper Need U (100%) by Duke Dumont, with the final sales coming in at midnight tomorrow.
A short service for around 100 people, led by the Dean of Westminster, will be held to receive Baroness Thatcher's body into the Chapel of St Mary Undercroft in the Palace of Westminster at 4pm on Tuesday, Downing Street said today.
The chapel will be open from 5pm to 9pm on Tuesday so that MPs, peers and parliamentary staff can pay their respects.
Baroness Thatcher's daughter Carol is expected to return to the UK tonight, her brother Sir Mark said.
Sir Mark left Lady Thatcher's Belgravia townhouse this afternoon after collecting flowers left outside the property.
Asked by reporters when his sister Carol would be returning to the UK, he said it would be "late, late this evening".
But he made no further comment on the plans for his mother's funeral.
Mark Biddiss, who started a social media campaign to get Ding Dong The Witch Is Dead to number one in the charts, said buying the song was "a very cathartic experience for a lot of people who feel that for many years they haven't been listened to".
He was joined on ITV's Daybreak by former Conservative MP Jonathan Aitken who said the song, which is on course for a place in the top five in Sunday's Offical Chart, was a "pretty feeble form of protest".