I made a reservation through the Website and saved at least a £100. But, it's weird, sometimes it would give me different prices and different availability depending on the time I picked up the car or time I was looking! I would have to start the search over again to find the cars!

My question, is can I actually change the reservation dates? I went to Avis' Website and I went to BA's and BA Rewards' Websites but I could not see an option to amend this online. I realised that actually, I would like to pick up the car a day earlier, but return it as I had planned. Doh!

Thank you.