I can understand why these things may be nerve wrecking to someone who has not done this before, but the mediation call is not a hearing, and needn't be a cause for concern.
There's no harm in having a copy of her defence to hand, but I'd advise her to avoid getting drawn into any protracted debate over it. It is not for the mediator to assess the strength of either party's case, and if the claimant wants to try and pick holes in her defence, they can do so at a hearing.
I would recommend she does not stray too far from the following key points:
- She has shared a copy of her defence with the claimant, and stands by its contents
- She believes UKPC's claim is without merit, and is therefore not prepared to offer any payment to settle the case
Stick to those points, don't be drawn into any protracted debate, or be swayed by anything the mediator or DCB Legal's rep may say. Offer nothing, and don't feel compelled to answer any question you don't wish to