At the 2019 general election by First Past The Post (FPTP), 45.3% of voters (nearly half) voted AGAINST the candidate who became their MP.
In Sheffield Hallam, 65.3% (very nearly 2/3) voted AGAINST the Labour candidate who became their MP. Only 34.7% voted for the “winner”.
In Ynys Mon, 64.5% (nearly 2/3) voted AGAINST the Tory who became their MP. Only 35.5% voted for the “winner”.
In Caithness, Sutherland & Easter Ross, 62.8% (more than 3 out of 5) voted AGAINST the Lib Dem who became their MP. Only 37.2% voted for the “winner”.
So much for the constituency link under FPTP!
With Single Transferable Vote (STV) in 5-member constituencies, at least 83% (5 out of 6) of voters would vote for their MPs and no more than 17% (one in six) would vote against them.
Now that would be a constituency link!