Would this top look ok with a black pencil skirt?

[Mrsgrumble]

It's for a christening. (My DS)

Or with tapered trousers?

Also does anyone know why is not on the actual river island site ?

www.asos.com/River-Island/River-Island-Lace-Shell-With-Contrast-Collar/Prod/pgeproduct.aspx?iid=4687933&CTARef=Recently%20Viewed

It would look fine, but perhaps a little office- like.

How about something like this (with camisole underneath) and this or this?

Nice. I think the lace lifts it out of office wear.

I don't think it would necessarily look office-ish but it might veer into waitress territory. It depends on what else it's worn with, I think.