First Tip: In order to manage and protect your own expectations, always assume that
you might end up in a multi-offer situation when you make any offer.
If you submit an offer before a multi-offer process starts, the agent must give you a chance to review your offer when the process evolves into a multi-offer situation. Similarly, if you are told that a sale is a multi-offer process but this changes to yours being the only offer (for e.g. the withdrawal of a buyer due to a change in circumstances), you are entitled to be informed of this. You will then be able to review your offer and submit a new one.
As a buyer in a multi-offer process, you need to put your best offer forward because you may not have another opportunity to change/increase your offer or negotiate with the seller. A best offer need not always be one with the highest price. It can be an offer with a lower price but with as few conditions as possible, or even an offer of the same price and conditions but with a higher deposit and shorter settlement date. That is not to say that you should exclude all conditions to your detriment since these conditions are meant to protect you.
Second Tip: You should check and satisfy some conditions before you make an offer.
This could include getting the LIM checked, having your solicitor’s approval and conducting building inspections. This will make your offer more attractive, especially if you were truly serious about buying the house.