To get an idea of how PR might work, I did the following:
For each Region of the UK, find the percentage vote for each party. Ignoring those with less that 5% of the vote in each region, share out the number of seats that the region currently has proportionally.This gives:
| Labour | 208 |
| Con | 248 |
| LD | 159 |
| SNP | 12 |
| PC | 5 |
| DUP | 5 |
| SF | 5 |
| SDLP | 3 |
| Alliance | 1 |
| UCUNF | 3 |
| Ind Unionists) | 1 |
However, some regions are much larger than others, and some are over-represented (basically Wales and Scotland), so the figures are not quite what we could expect from such a system after reform, but they are not far off.
It’s not completely proportional, mainly because the 5% cut off removes the smaller parties. A lower cut-off would bring in the BNP and UKIP but it would have to be about 1.5% for any Greens to get in.
The middle of the line 
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