I thought the HMRC were cracking down on the scheme with respect to the final value paid. I'm sure I'd heard stories of companies having problems after being audited
From HRMC
"However, at the end of the loan period, the employer may choose to give the employee the option to purchase the equipment. Typically this would be offered at substantially less than the original value of the equipment, but to prevent a taxable benefit in kind arising as a result of the transfer of ownership the employee must pay the employer the full market value of the equipment"
Don't see how anyone could argue that fair market value of a 1000 pound bike after 1 year of use is 50 quid.