I have been working at Yodel part-time (Less than a year)
The staff were great
The pay was not the best
I applied through an employee referral. The process took 3+ months. I interviewed at Yodel (London, England (UK)) in January 2018.
You need to be quite technical in your answers, and give examples etc... You will need to be patient as well as the process can take up to 8 weeks before they get an offer out.