Amex Presentation

Our presentation is next week (2 of us booked in - me and my father).

He is not well and may not be able to attend. Can my other half attend in his place? She was due to be our 1 and only +1 and obviously wasn't going to attend but under the circumstances is this ok? It does not affect numbers at our booked presentation or number of tickets purchased, just a different face on the day.

Not sure actually, I wouldn't imagine it would not be a problem, as one place per season ticket is the rule.