I was unable to book return trip for myself and wife to Oxford via National Rail website, so booked through Raileasy.
I was sent a total of 24 separate tickets for this return.
Each ticket had a different seat reservation mostly in different carriages and as the train was very full we had a musical chairs journey.
But using Raileasy did save me ----£0.16.
There is no way of knowing we would need this ridiculous number of tickets until we paid for them