A part of Spencer's interview was previewed on the BBC World Service and Charles Spencer went all out on the interviewer and raised his voice at her. He's right and the Palace and everyone else is wrong. "I'm telling the truth!!" If you're so riled and defensive at a reporter's questions, then perhaps everything you wrote was not all the truth.
I see everyone's points. An unexpected death is horribly stressful, the Spencer's lost a sibling and the Royal Family lost the mother of the POW's children and of the Queen's grandchildren. The Royals also had to put up with the media making things worse by accusing the Queen/Royal Family of not putting on a show of grief and "caring" in public.
Both Charle's are know to have tempers and I can imagine Spencer calling the POW and railing at him and the POW responds in kind. The POW may have stated that he wanted his sons to walk behind the funeral carriage as a special meaning for them because as they grow older, memories of that day may fade in time. I'm just purely speculating on this and Spencer took the info as he now states.
I still think he's lying. It's all to get money that he's lost by marrying so many times and now having to pay out. It appears the majority of the public isn't buying his allegation. I agree wholeheartedly he's had 29 yr. to bring this all up, but waited until now, conveniently after his weasel nephew brings the subject up and Spencer is now strapped for cash. Diana has been gone for 29 yr. and yes, memories have waned with the public and there are young people who don't know her and really she isn't an interest to them.
It's interesting it's all about Harry being forced to walk behind the funeral carriage when I've read William first brought up a reluctance and Prince Philip told the boys he would walk with them, Spencer never said that.....