Found pedal cycles

Can you help us reunite these bikes with their owners?
We have 5 bikes at Malton Police station that despite all our enquiries we have not been able to trace the owners of. 
Bike 1 - Giant trance mountain bike - This was located in Malton in July - Reference number 12250130425
Bikes 2/3/4 - Trek Marlin 6 / Apollo Phase / Apollo Jewel - These were located near Helmsley in August - Reference number 12250161184
Bike 5 -  Merida - This was located near Tesco, Norton 25th September  - Awaiting reference number
Please contact NYP via 101 or email geoffrey.wynn@northyorkshire.police.uk if you have any information that may assist in returning the bikes to their rightful owners