Layer Estimates:

Layer: London_Ward (ID:0)
Count: 657
Extent:

XMin: -57446.0309123499
YMin: 6670755.86119106
XMax: 38004.2624354904
YMax: 6745633.39027386
Spatial Reference: 102100 (3857)

Layer: London_Ward_CityMerged (ID:1)
Count: 633
Extent:

XMin: -57446.0309123499
YMin: 6670755.86119106
XMax: 38004.2624354904
YMax: 6745633.39027386
Spatial Reference: 102100 (3857)