Lord Heseltine's office has confirmed to ITV News that he is attending Baroness Thatcher's funeral on Wednesday.
The former Labour leader Lord Kinnock is already attending the funeral of a councillor in his former Welsh constituency of Islwyn who was a close personal friend.
Downing Street has released a detailed Order of Service for Baroness Thatcher's funeral on Wednesday.
The full details of Baroness Thatcher's funeral have been released by Downing Street.
Baroness Thatcher's daughter Carol has spoken publicly to thank everyone who sent messages of sympathy and support.