Please dress me for a christening - godmother emergency

[EmergentWriting]

I really need some help, quite urgently, to dress for a christening this weekend.

Budget is pretty tight, looking at £60 or so.

It's a church event (well, christenings tend to be, don't they?!) followed by a family barbecue / garden party thing.

I'm the godmother so I need to look reasonable for photos and so on.

Tall, dark, hate my shoulders and stomach, the rest is OK.

Not a clue what to wear. Not a clue.

something like this?

Yes, I rather like the style of that one. Not 100% about the colour, but the dress is very nice.

Would need to give some thought to a bag - the one she has on the catwalk looks like a bookbag under her arm.