Firstly, apologies to site admin if I should of put this question somewhere else

We received an 'Immunisation Record' sheet with our visas for our four children, which needs to be filled out by a medical professional prior to leaving the UK.
My question is........ do you actually get asked to show this form in relation to the children starting school etc etc?
My children have all had every vaccination that has been offered to them to date, but I am experiencing resistance from my GP surgery with regards to the completion of these forms. They have advised that it is not something which they have done before (find that hard to believe) and that they will be making a charge for each one (fair enough) but will not even give me an idea of how much!

Just wondered if the documents are really necessary and how often they are required when you first land.
Suppose I should have them done - better to be safe, than sorry!
Any thoughts welcome.
Thanks
Alison