This app was mentioned in 2 comments, with an average of 1.50 upvotes
You have to pay at motorcycle bays, same as in whole Westminister. Its 1£ a day, 3£ weekly, 12 monthly, 100 annually. And park ONLY in designed motorcycle bays. You are not allowed in car bays.
There is quite few bays around Victoria , depend;ng on a time you will most likelly find space , if not look around and you will be in 10 m;nutes walking distance from one.
Use this app for payment.
https://play.google.com/store/apps/details?id=co.uk.ringgo.android
Use this site to find where are the motorcycle bays.
Use this .https://play.google.com/store/apps/details?id=co.uk.ringgo.android
it's so easy