All the details you give us go into determining whether we can cover you or not, and how much your quote is. Changing the smallest detail (which you may not even be aware of) can give you a different price.
Some things, like the date you’d like a policy to start, will change your price even if you put in the same details.
The best way to guarantee you get the price you've been offered is to buy straight away, or retrieve the original quote. We save your price for 10 days or until your chosen start date if that's sooner.
Once a quote has expired, you may find your price changes even if you use the exact same details. This is because all insurers adjust their prices regularly.