@JamieFrasersBigSwingingKilt
Compare prices on the Parkers website and negotiate, negotiate, negotiate with the 2 or 3 cheapest providers. Create a spreadsheet so you can work out total ownership costs over the complete term. This should include deposit, brokers fee and total monthly payments. Good luck!
Excellent advice to do a spreadsheet of all the costs, including any "balloon" payment at the end should you wish to keep the car.
Another thing to watch is that lease firms like to quote prices before VAT, especially for business customers, so if you're not a VAT registered business, you need to add 20% to all payments, as that's what they'll be taking from you. I.e. if it's advertised/quoted at £200 per month plus VAT, then what you have to pay is £240 per month, same with balloon payments, if it's says £2000, the you pay £2400.
There are quite a few "traps" that can catch you out as the lease agreements are usually complex and some have several different types of payment. I.e. you may get quoted a 48 month deal at £200 per month (so you think total cost is £9600), but then they want a deposit, usually at least 3 or 6 months, so say 6 months, that's £1,200, so the total is £10,800, which isn't the 48 months they said, it's actually 54 months.
Finally check whether you own the car or not at the end. Some leases give you option to buy, sometimes that's a nominal amount, say £50, sometimes it's a balloon payment that could be thousands. So at the outset you need to think whether you want to pay for it for 3/4 years and then keep it or whether you want to hand it back. The monthly payments can be very different depending on what you want to do at the end.