Right, quick check for you.

Ask your bloke @ Ford about these 2 finis numbers:

1112547 (wheel bearing - not Focus RS without ABS)
1113967 (wheel bearing - not Focus RS with ABS)

Also, a bearing kit is available which is 1112547, which you DO NOT supply if the vehicle has ABS.

Which part number did you get?

Also, this is a known issue with the Transit Connect as they use the same idea (although different bearings).

The serated (toothed) ring would be the conventional method, but... the bods @ Ford decided to try another way on the Focus and Transit Connect which should have been more reliable, which was inserting the pickup point into the bearing.