Do the DVLA have the right address for you?
Do you know when the DVLA updated?
Yes, but the DVLA do delay sometimes in doing the handover.
She can always go to the Magistrates Court and apply for the matter to be reopened. She can also make a statutory declaration although there should be no need to do that.
The reason the fine is so high is that it includes a failing to identify and the costs of a trial in absence. A plea to speeding will attract a lesser fine and limited costs although it is fair to say that it will still be higher than the fixed penalty would have been.
Can I clarify anything for you?
That would be a fine and points although it is probably for failing to identify not speeding as she did not respond to the S172 form.