You can get agreements in principle, but they don't mean much. They mean they've done a credit check on you, and, if your income is what you say it is, they might give you a mortgage if the wind is in the right direction when you come to apply.
ClueLess - you forgot
- wait for ages while your buyer's buyer fails to get a mortgage
- panic while buyer's buyer pulls out
- sigh with relief when your buyer finds someone else to buy theirs
- nearly get to exchange and have chain fall apart again
- wait while chain reforms
- lie to removal men, telling them you are definitely moving on xx date
- exchange and complete and move on the same day
- sit quivering in a corner of your new home muttering to yourself
- vow to never move again