No worries and cheers for the detailed response, I was hoping there was some manual override on the flash but not to worry.
I'm wondering if I need to keep the aperture wide for creative reasons and a shutter speed faster than 1/250s to expose for the ambient correctly on a bright day then I don't think I'll be able to use off camera flash as fill, so I guess it's down to a reflector or keep the flash on the camera?