The exact split depends on how you measure the market (mortgages vs all purchases, full year vs monthly snapshot), but the UK picture is broadly consistent:
For a typical recent UK market snapshot:
Right now, the UK housing market is unusually first-time buyer–heavy, with them making up the majority of buyers, while home movers are a smaller (but still significant) minority.
If you want, I can break this down by London vs rest of UK or show how the split has changed over time.
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