Clipless pedals question(s)

I'm w shasta, never cinch the straps on my clips unless my shoes are a lot larger/smaller than the ones I wore last time. Set them once per ride, leave them alone.

^kind of how i'm imaging it - this is more so i don't have to don bike shoes just to go up the shops or to the pub or whatever! i have no problem with clipless for impending purchase of serious bike, tho.

yeah this^^^

for city/leisurely biking = clips
for RIDING = clipless

Lidl shoes mentioned upthread have finally given up, culminating in a frantic 'I'm turning my ankle, why aren't I unclipping oh shi-' moment. I have to cycle home later, and I won't have a chance to buy new shoes. Bike has these pedals http://www.chainreactioncycles.com/Models.aspx?ModelID=3759
Do I:
wear my work shoes and try not to slip off the pedals
take the cleats out of my SPD shoes, and try not to slip off the pedals/get the pedal stuck in the cleat-recess area
pretend what happened this morning didn't really happen
?

a). I had to ride home with normal shoes on my fixie with eggbeaters recently. One worrying moment at the beginning where my feet flew off the pedals at speed, but after i slowed down a bit it was easy enough.

Yeah, I'm not even riding fixed anymore, so it shouldn't be that much of a problem. I overthink things.