I’d look very carefully at the complete cost of ownership, if this is what you want to achieve.
If you have a monthly payment mindset, then go right ahead – and do compare PCP to lease costs. But if you want to own the vehicle at the end of 24-48 months, then there will probably be cheaper ways to do so (e.g. hire purchase or bank loan) – even accounting for lower upfront discounts.
Over 10 years and, say 120k miles of use, someone paying £1k upfront and £250 per month for a modest new car every 3 years on PCP will spend £33k – and have no car at the end.
Over the same period and mileage, picking a £10k used car once every 5 years will cost £20k (assuming £3k retained value after 5 years for both cars and a pessimistic £6k of repair costs over 10 years) – and have a car at the end of 10 years.
£13k buys a lot of bikes over 10 years!