There is no shortage of contenders for London's worst cycling roads, but Victoria gyratory is a particularly strong play.
The approach to Victoria along Ebury St is not bad - contraflow cycle lanes and relatively quiet. As you get to the end of Ebury St, this is what awaits you:
The first leg of your detour takes you up Grosvenor Place:
Above, we approach the Buckingham Palace Road junction,
It's 2-way now. As you can see, there's acres of space. You could get a wide mandatory cycle lane in and still get an oil tanker in the remaining tarmac. At least there's no parking though.
Victoria sums up what's wrong with cycling in London. Just when you need decent cycle facilities, there's nothing. You cannot easily avoid Victoria without a considerable detour. Yet there is plenty of roadspace here: TfL don't even have that excuse. In addition, they've turned Beeston Place into a one-way rat-run for no apparent reason.