First pony wanted in Derbyshire

Looking for a first pony for my 5 year old. Need something to help build her confidence that can begin as lead rein and then move on from there. Must be trustworthy and good with children, dogs, machinery as will be living on a yard at our busy household. Would prefer a loan with view to buy as we are first time owners and would like to ease into it if possible, to make sure our daughter is definitely keen to pursue her current love of horses!