All three Armed Services are to play a role Baroness Thatcher's funeral with particular reference to the Falklands conflict.
The death of Baroness Thatcher dominates all of the UK newspaper front pages today.
Baroness Thatcher, who was Britain's prime minister for over a decade, has died today aged 87 after suffering a stroke, her family said.
Before entering Parliament in 2001 Patrick Mercer OBE spent 25 years as an army officer with the Sherwood Foresters, following in the footsteps of his father who had served in the same regiment during the Second World War.
During this time, Mr Mercer served in a number of countries, including Northern Ireland where he completed nine tours. As well as serving in Uganda, he commanded his battalion in both Bosnia and Canada.
His parliamentary career took off in 2001, when he overturned a Labour majority of 3,000 to become MP for Newark.
In 2003, he was appointed to the frontbench by the then Conservative leader Iain Duncan Smith and became the party's spokesman on homeland security.
He continued to speak for the Tories on issues of national security even after Mr Duncan Smith was succeeded by Michael Howard, and later David Cameron.
Tory MP Patrick Mercer is no fan of David Cameron. News that he was about to resign the Conservative Party whip triggered speculation he was about to join UKIP. Or that he was about to say Cameron should be challenged for the leadership.
However, the decision was prompted by a newspaper story which was due out tomorrow. He is facing allegations over lobbying and failing to register his activities.
Mr Mercer says he has referred himself to the Parliamentary Commissioner for Standards. He has also decided not to stand as the MP for Newark at the next election.
Mercer was forced to leave the Shadow front bench in 2007 when he said it was acceptable to refer to ethnic minority soldiers as "black b*****ds."
Downing Street says the Prime minister is aware. But he won't be choking on his Spanish cornflakes on his Ibiza holiday that this particular MP has left the family.
BBC's Panorama show said they have been investigating lobbying and conduct of MPs and members of the House of Lords and sought a response from "a number of people including Mr Mercer." In a statement the broadcaster said:
BBC Panorama has been investigating lobbying and the conduct of MPs and members of the House of Lords.
The programme is still being made and will be broadcast as soon as possible. The investigation has raised a number of issues related to those involved. Panorama has sought responses from a number of people including Mr Mercer.
Newark MP Patrick Mercer has said he is quitting Parliament amid allegations that he broke rules on lobbying.
The backbencher said he was resigning the Tory whip immediately "to save my party embarrassment", and would not stand at the next general election.
In a statement, Mr Mercer said: "Panorama are planning to broadcast a programme alleging that I have broken Parliamentary rules.
"I am taking legal advice about these allegations - and I have referred myself to the Parliamentary Commissioner for Standards.
"In the meantime, to save my party embarrassment, I have resigned the Conservative Whip and have so informed Sir George Young. I have also decided not to stand at the next general election."
Newark MP Patrick Mercer has said he is resigning from the Conservative Party whip
The eight pall-bearers who carried the casket into the Cathedral were drawn from Army units, Royal Navy ships and RAF stations with links to the Falklands war, commanded by Major Nick Mott of the Welsh Guards who served in the 1982 conflict.
Lady Thatcher's grandchildren Michael and Amanda walked ahead of the coffin as it entered the cathedral, carrying cushions bearing the insignia of the Order of the Garter and Order of Merit, which were laid on the altar.
Cabinet Office Minister Francis Maude, the man responsible for organising Thatcher's funeral, said the costs are a "fraction" of the figures being "banded around".
Speaking to Daybreak he said: "The state will always pay for the costs of the funeral and memorial of a former Prime Minister and Margaret Thatcher was very adamant she did not want to have a separate memorial service.
"So this is the one occasion when people will get their chance to pay their respects, give her a send off and commemorate what was, by any exception, a really remarkable life."
The funeral of Baroness Thatcher, which is being planned by a special Cabinet Office committee under the name ‘Operation True Blue’, will reportedly cost around £10 million.
Cabinet Office minister Francis Maude yesterday said MoD, the police, Number 10, Parliamentary authorities, the Thatcher family and the Conservative Party were in involved in planning the ceremony.
It will be the biggest security operation since the Olympics, according to The Sun, as fears mount that protestors could attempt to disrupt proceedings.
The Guardian says the threat of Irish republic terrorists are under the spotlight.
The Independent reports that social media and internet forums are being monitored for potential troublemakers.