@Smudge
Leaving the house to get food if you are well enough to do so isn't against the shielding advice, because that's what it is, advice.
Quoting from the shielding document:
"Shielding is for your personal protection. It is your choice to decide whether to follow the measures we advise."
Rejecting all of it by carrying on as before would be taking the wee, but reducing pressure on stretched resources by obtaining your own food is, I reckon, being more socially responsible, not less.
As the document says, the measures are for your protection.
If you practise social distancing while shopping, you are causing no greater risk to others.
Get yourself down to
Morrisons - it's nice and quiet in there.
https://www.gov.uk/government/publi...ng-extremely-vulnerable-persons-from-covid-19