Sunday 10 May 2015

Appraisal of my UK 2015 GE seat predictions vs bookie predictions

Accuracy of seat predictions compared by region:

Region My accuracy Bookie accuracy Hustings accuracy
Whole UK 571/650 (87.85%) 589/650 (90.62%) 557/631 (88.27%)
Scotland 51/59 (86.44%) 55/59 (93.22%) 49/59 (83.05%)
Wales 35/40 (87.50%) 36/40 (90.00%) 35/40 (87.50%)
London 68/73 (93.15%) 66/73 (90.41%) 67/73 (91.78%)
East Midlands 36/46 (78.26%) 39/46 (84.78%) 37/46 (80.43%)
West Midlands 51/59 (86.44%) 55/59 (93.22%) 53/59 (89.83%)
South West 52/55 (94.55%) 46/55 (83.64%) 45/55 (81.82%)
Eastern 51/58 (87.93%) 53/58 (91.38%) 52/58 (89.66%)
North East 27/29 (93.10%) 28/29 (96.55%) 28/29 (96.55%)
South East 78/84 (92.86%) 77/84 (91.67%) 77/84 (91.67%)
North West 61/75 (81.33%) 67/75 (89.33%) 67/75 (89.33%)
Yorkshire and the Humber 45/54 (83.33%) 51/54 (94.44%) 47/53 (88.68%)
Northern Ireland 16/18 (88.89%) 16/18 (88.89%) -

Predictions compared by party:

Party Actual Seats My prediction Bookie prediction Hustings prediction Closest
Alliance Party 0 1 (+1) 0 (0) 1 (+1) Bookies
Conservative 330 283 (-47) 280 (-50) 275 (-55) Me
DUP 8 8 (0) 9 (+1) 8 (0) Me/Hustings
Green 1 3 (+2) 1 (0) 1 (0) Bookies/Hustings
Labour 232 279 (+47) 264 (+32) 282 (+50) Bookies
Liberal Democrat 8 3 (+5) 26 (+18) 19 (+11) Me
Plaid Cymru 3 3 (0) 3 (0) 4 (+1) Me/Bookies
Respect 0 1 (+1) 1 (+1) 0 (0) Hustings
SDLP 3 3 (0) 3 (0) - Draw
SNP 56 50 (-6) 54 (-2) 46 (-10) Bookies
Sinn Fein 4 4 (0) 5 (+1) - Me
Speaker 1 0 (-1) 1 (0) 0 (-1) Bookies
Sylvia Hermon 1 1 (0) 1 (0) - Draw
UKIP 1 10 (+9) 2 (+1) 3 (+2) Bookies
UUP 2 1 (-1) 0 (-2) - Me

Actual Seat change summary:

Party Seats Lost Seats Held Seats Won Total Seats Change
Alliance Party 1 0 0 0 -1
Conservative 10 293 37 330 +27
DUP 1 7 1 8 0
Green 0 1 0 1 0
Labour 49 209 23 232 -26
Liberal Democrat 49 8 0 8 -49
Plaid Cymru 0 3 0 3 0
Respect 1 0 0 0 -1
SDLP 0 3 0 3 0
SNP 0 6 50 56 +50
Sinn Fein 1 4 0 4 -1
Speaker 0 1 0 1 0
Sylvia Hermon 0 1 0 1 0
UKIP 1 1 0 1 -1
UUP 0 0 2 2 +2

Bookie prediction change summary:

Party Seats Lost Seats Held Seats Won Total Seats Change
Alliance Party 1 0 0 0 -1
Conservative 36 267 13 280 -23
DUP 0 8 1 9 +1
Green 0 1 0 1 0
Labour 38 220 44 264 +6
Liberal Democrat 31 26 0 26 -31
Plaid Cymru 0 3 0 3 0
Respect 0 1 0 1 0
SDLP 0 3 0 3 0
SNP 0 6 48 54 +48
Sinn Fein 0 5 0 5 0
Speaker 0 1 0 1 0
Sylvia Hermon 0 1 0 1 0
UKIP 1 1 1 2 0

My predicted seat change summary:

Party Seats Lost Seats Held Seats Won Total Seats Change
Alliance Party 0 1 0 1 0
Conservative 50 253 30 283 -20
DUP 0 8 0 8 0
Green 0 1 2 3 +2
Labour 38 220 59 279 +21
Liberal Democrat 54 3 0 3 -54
Plaid Cymru 1 2 1 3 0
Respect 0 1 0 1 0
SDLP 0 3 0 3 0
SNP 0 6 44 50 +44
Sinn Fein 1 4 0 4 -1
Speaker 1 0 0 0 -1
Sylvia Hermon 0 1 0 1 0
UKIP 0 2 8 10 +8
UUP 0 0 1 1 +1

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