Louisa Preston on ITV?

I just saw the 4pm headlines on ITV NEWS CHANNEL and Louisa Preston from BBC London News is presenting. Any details as to why?

has she, and this is a stab in the dark, changed jobs do you think?

I think she must be freelance, I know she did presenting for Five when they used ITN and that she does LDN also.

She's no stranger to the ITV News Channel - she did a number of presenting shifts on the channel whilst she was still at Five News.