Mortgage deals are typically on offer for just 15 days before being pulled, despite homeowners and buyers having the widest choice for 16 years.
This is the shortest shelf-life in six months, according to financial information service Moneyfacts.
As a result, people have little time to decide when rates are volatile.
One adviser said the situation was adding extra stress to a huge financial commitment and making customers feel pressured to make a decision quickly.
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