Given that Autostore's patent on the idea is from 1997 [1] and has expired, it's difficult to see how they could have another, non-expired patent on the same thing.
AutoStore alleges Ocado is infringing on the following five patents: 10,093,525[2], 10,294,025[3], 10,474,140[4], 10,494,239[5], and 10,696,478[6].
[1] https://www.therobotreport.com/autostore-sues-ocado-over-as-...
[2] https://patents.google.com/patent/US10093525
[3] https://patents.google.com/patent/US10294025
[4] https://patents.google.com/patent/US10474140