In answer to an enquiry: If you want to contact Helen Flanagan probably the best address to use is the following:
c/o Coronation Street
Manchester M60 9EA
As with contacting any celebrity don't expect a quick reply, often this can take two to three months. Always enclose return postage or a pre-paid envelope.
For fans of Coronation Street in general pop along to the Coronation Street Blog. It's a Corrie fan blog with Weekly Updates - which you can have sent by email if wished. Well worth a visit.