In brief:
Posh extended family lunch thing on Saturday for a golden wedding anniversary.
Unutterably dreadful week from hell at work. Absolutely zero opportunity to go shopping. Nothing whatsoever to wear.
Cannot even go to Next / M&S at local retail park in the evenings as DH works away from home and no childcare (and just cannot face dragging 5,6 & 7 y.o shopping of an evening in last week of term, it would be suicidal).
Please find me something vaguely suitable, up to £70, from an online retailer that can deliver by close of business Friday.