>> the magnificent trish ubutess week, the wonderful words of president obama, these have given me strength. this is going to be a tough and tearful week even for the daughter of the iron lady. >> lady thatcher's funeral service which will be marked by ceremonial grandeur will take place at the cathedral monday morning. >> margaret thatcher's funeral is a symbolic funeral. it's not on the same level as princess diana or even the queen mother. >> even the cusp of the funeral is now a matter of dispute. it's estimated to be at about $15 million, if you look at the guest list, it's perfectly hon most why that price has risen. queen elizabeth will be in attendance along with prince