If you are paid an 'honoraria' for something, are travel expenses charged extra?

[Legacy]

I did a conference speech for a trade association meeting. Agreed an 'honoraria' sum for the prep & presentation.

I'm about to invoice, but am not sure if I should add expenses (mileage of about £30 in this case) as an extra, or if this term would normally be used to cover these?

It wasn't specifically mentioned at the time.
Any ideas?

I would think you need to ask the organisation you did the work for whether they intended the payment to cover expenses, and make sure another time that you are clear beforehand about how any costs you will incur will be reimbursed.

I'd just invoice them with expenses added. It's not a huge sum - they're unlikely to make a fuss about £30 (unless it's a huge % of the initial fee - is it?)

I would never include travel expenses as part of an honorarium. I would add travel expenses on top.