A nice little cabin bag for your carry-on. Four wheels let you roll it standing up and it has several storage compartments, among them a laptop compartment.
From Selfridges
Samsonite Black Neopod Spinner Hard Case 4 Wheel Recycled-polypropylene Expandable Cabin Suitcase 55cm - BLACK
John Lewis & Partners
Samsonite Neopod 4-Wheel 55cm Cabin Case