Hi M
Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work
www.benefitsandwork.co.uk/help-for-claim...q/general-faq#Gen140 The information you have been given is partially correct in regards to mobility component, if you receive DLA mobility component, a change in your care needs after you reach pension age enables your DLA award to be superseded. This means you can claim the care component (at the middle or highest rate) rather than attendance allowance, even if you are aged over 70.
Gary
@DLA