The best Lurpak substitute I have found is the Waitrose own brand.
I use B&M for chocolate bars for packed lunches, laundry products and washing up liquid. I use Lidl for sliced cheese. Veg is local or Waitrose as it lasts longer.
I have an enormous stock of shower gel and shampoo from when we were living abroad, so we will work through that before buying more.
I have enough clothes, so will make do, and now dh is retired he lives in jeans or sports kit anyway. Ds is earning so can buy his own.
It's worth signing up to the Twinings website as they have offers on black tea during the year. I can normally make a decent saving and get free postage if I order enough. I have room to store it though.
For coffee, I buy the boxes of instant latte, cappuccinos, flat whites etc, for my one coffee a week, as I am a tea drinker. In a nice mug with a sprinkle of chocolate on top, it does the job.