Ha, thanks for the shout out KFDancer. I really cannot comment on the English system, because it's all quite different.
We have in Scotland home reports required now, which tell you things like the house survey details, an energy report and a property questionnaire and tell you a valuation of what a house is worth. So whilst it hasn't killed offers over, few people are willing to pay more than what the home report says (well in the last few years, since there isn't such a boom in property). Obviously, if the property is popular, people will overbid.
Good luck historyenne, this all sounds so exciting!!!