The cross bars on the Landrover Defender Expedition rack are just Thule WingBars, so all our roof mounted bike carriers come with fittings that work with these roof bars:
T-track fittings are supplied with the Atera, Cruz and Thule racks, they fit into the channel on the cross bars. The Yakima bike carriers don't come with T-track adapters but their roof bar fittings are wide enough to fit around these bars. The Inno Tyre hold fits but you'll need a long bolt kit (available separately).