If there are any other examples of this error, could you send these (or let me know how I can spot these issues)?

Update - I have looked into this and it would appear this was an existing issue before I made adjustments as it affected an area I didn't change. I have now rectified it.

Thank you for this. I'm not seeing these error myself, if you could point me in the right direction?
I am personally more comfortable with the iD editor however I will bare this in mind.

Hello - correction: Sorry, only Hermiston Gait is two ways for both buses and cars. The Shore is one way for cars and two ways for buses, but I changed it as I was having issues with the map behaving as if buses were also one way only.

Hi, thank you. Yes these roads are two ways for cars as well as buses.