Reusing compost from pots

Wondering if forum members re-use soil/compost from last year's pots? It seems so wasteful to just put it on the garden when there are many pots to fill eachyear. I have to say I do re-use, with the addition of a some more home made compost and a handful of national growmore or dried chicken manure, then feed as usual throughout the season.
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Anything that needs a lot of sustenance [like sweet peas] would benefit from a much heartier mix - perhaps with manure, although in a very big pot, old compost can be used in the bottom to fill space, especially if annuals are only going to be using the top 6 inches or so.
I use most of mine as mulch - far better to feed the soil in that way, to improve the overall structure.
I live in west central Scotland - not where that photo is...
When you don't even know who's in the team
S.Yorkshire/Derbyshire border