Hi @Mags
If you paid out for the events (which I assume you did), then you would enter these as a purchase invoice, as you would any other purchase, especially if you’re VAT registered.
If they do take place on a recurring basis going forward, and are with the same “supplier”, then you could also set up a recurring purchase which would create the purchase invoices for you on a regular basis.
Regarding this point, I recommend taking a look at the business mileage article. There are certain things to consider with this (e.g. what is and isn’t business mileage).
I hope that helps!