Boys shoes for a wedding

[gotitwrongagain]

Invited to a summer wedding and I need to dress my boys. Their outfits are similar to this uk.monsoon.co.uk/view/product/uk_catalog/mon_3,mon_3.30,mon_3.2.1/2160900214 with matching shorts.

I want navy shoes to go with it, I'm thinking either www.marksandspencer.com/kid-s-leather-derby-lace-up-shoes/p/p22491852?image=SD_04_T72_2750L_F0_X_EC_90&color=NAVY&prevPage=plp or www.marksandspencer.com/kids-leather-riptape-footbed-sandals/p/p60094184?image=SD_04_T72_4263U_F0_X_EC_90&color=NAVY&prevPage=plp&pdpredirect.

Boys are aged 5 and 1. The sandals are almost half the price of the shoes, I'd probably have preferred something more like loafers but can't see anything that I like.

Any advice?

What about these?

www.next.co.uk/shop/gender-olderboys-gender-youngerboys-productaffiliation-footwear/category-shoes-colour-blue-colour-navy-feat-available

Thanks Heebe,
I had a look at those earlier and can't exactly remember why I didn't like them. Having a bad experience with next shoes in the past is probably one reason. Also, I wondered with all the tan rubber they might look too 'heavy' iykwim. Thanks though.

Will check back tomorrow for any other suggestions. Time I was asleep!