If there are disproportionate deposits and withdrawals in the bank statements, they should be explained in the sponsor's letter.

so i would advise not sending the statement with the large deposit going in your account, that means you'll have to wait for 6 months of statements after you've put the large deposit in.

or another option say you've got £1,000 in your bank but you can't save say £300 or £400 a month but you can save £100 or £200, so what you do is borrow say £200 a month from a friend use that to help you live off (food, petrol etc), so for the next 4,5 or 6 months your saving £400 of your wages in your current account, so you'll have £2,600 or what ever, dont over do it, and save loads of money, or they will get suspicious and wonder what your living off !!! use a bit of commen sense

remember they will be looking at your bank statements !, but a warning even if you've got savings, dont apply if your out goings are greater than your incomings , so you might have to do what i just said if they are