Sorry, @Rjevski but you are missing the point. I assume you haven’t applied for a mortgage in the UK yet? Anti money laundering regulations require the lender (as well as your solicitor) to assure themselves that the money you use for your deposit has been acquired legally. Additionally the lender will want to assure themselves that no 3rd party will have an interest in the property you are buying. The most common practice is to request statements for the past x months for your savings account.
Ordinarily, they won’t show much, apart from money going in and out of the account (hopefully more in than out), often at simple monthly intervals. So, if you are providing the last 3 months, then often that statement is only expected to show start balance, 3 transactions, and end balance.
However, it has an important reason: The statement will list the name of the one paying the money in. If that name isn’t your name (e.g. for cash deposits, or gifts from your parents), then you will be asked questions and to provide further information as to where the money is coming from (particularly for cash deposits). If its coming from 3rd parties (e.g. your parents) you will be asked to provide a letter in which they declare that (simplifying) the money was a gift, and that they won’t have an interest in your property.
This is standard practise in the UK and almost all mortgage lenders and solicitors will expect you to provide 3-6 months worth of statements for the account that you are paying your deposit from, and if you don’t have that then I think plenty of lenders and solicitors will get rather nervous…