Which shoes to go with these two dresses?

[FatimaLovesBread]

I have bought two dresses for weddings/christenings and I need a pair of shoes to go with them.

Ideally I'd like flat, strappy sandals but I'm open to suggestions. Preferably less than £50, ideally pretty sales ones for £20

Two dresses are grey one and flowery wrap dress

Nice dresses, gold would work with both.

here
here
here

is a slight wedge doalbe?
here
here

Sorry forgot about this thread.
I have since bought a third maxi dress and so was thinking silver or light strappy sandals if they were to go with all three? I browsed round Trafford Centre last night and found a few possibilities but nothing jumped out.

Too Casual? Very comfy though
too glitzy?
Not in my size
Too glittery?

It's too hard, can I get away with silver Havaianas because i'm pregnant