£450 a month sounds a lot, if you are covering 35k a year then it's about right I guess but if you only cover 12k then it's expensive.
You think that's expensive. Our previous lease company (Masterlease - shudders at the mention of their name), were charging more - My current lease (FR CR 170) is costing more that the quote for the MK3!
Being mildly curious, I did a quick search. Googled
seat leon lease > first result > leasecar.co.uk > 3 year lease ~ £285 + VAT for 10K and excludes maintenance > added maintenance, 20K (my miles), 18's, metallic paint = ~£440 (inc VAT), plus the initial payment is 3 months (we pay 36 x equal payments for a 3 year contract) , i.e. ~£1300 (followed by 35 x £440).
As I said, this was just a quick search, and the price wasn't far off £450. Don't know whether this covers tyres, my lease does, and (18") tyres for a Leon ain't cheap. A colleague of mine has an A4 3.0 TDi, does approx 40K miles per annum, and sometimes only gets 10K from a set!
I've no doubt that there are better deals if you look harder, and tailor it for your needs.
Whether it is a bit expensive doesn't really matter, as the the money I get is against a benchmarked car. If the Leon was cheaper then, the benchmarked car would be cheaper, and the contribution from my company would be less.