Hi Debbie,
Thanks for your post, to put your mind at rest, your tour has been cleared to run so I hope that's a relief for you 🙂
In terms of the airports, I see what you mean, I'll have a look into this, you will definitely be flying from Gatwick!
If you click on 'book now' Gatwick appears on the first page of the booking process so its a slight problem with the website but I very much appreciate you bringing it to my attention!
Kindest,
Ben