It depends how much you want to borrow, for how long, and your personal circumstances. Borrowing options include:
0% purchase credit cards: ideally, you’ll need to repay in full before your 0% period ends and keep up with the minimum monthly repayments.
Personal loans: if you have a good credit score, you could get lower rates.
Secured loans: using an asset, like your home, as collateral could mean lower rates, but your home could be repossessed if you fail to make the repayments.
Car finance: includes loans that are secured against the car you want to buy.
0% overdrafts: a few bank accounts, particularly student and graduate accounts, let you go overdrawn in the short-term without paying any fees or interest.