I would not attempt that in front of the police Kinell, even if you reverse park, that only applies if you have come down that One Way St to park up, if you have come up to a one way street off a main road you will get done if you are caught reversing into a parking space, more than likely this answer will be checked out from people on here.
i always thought that you only cannot exit or enter the road at the wrong ends...once in the road you can drive the other way...
it is a ' no entry' sign not a 'one way'... isnt it?
for instance if you lived at number 88 and wanted to pick something heavy up from number 3, you could go back down
If you are going up that O W ST Joko, & you live at the middle or the top 7 you wanted to pick something up at No 3 or so, you will have to go around to enter that street again ( By the law but who does).
She may have committed a traffic offence, but parking wardens have no authority over that.
The Police show so little interest in parked cars these days that I think it unlikely they would take any action unless they actually saw the car moving the wrong way.
No Joko....the no entry signs are just to make it clear for drivers that it's a one way street. Then, like Hopkirk says, you have small white arrows telling you which direction to travel in.