The five safest Labour, Torie and Lib Dem seats if the US used the UK system

[I spent the winter writing songs about getting better]

But the same House districts. What would they be?

[Vepres]

Liberal dems would probably be safest in upper New England and parts of the Pacific coast, Labour would win in current Demcoratic strongholds, and conservatives would probably win currently lean-Democrat districts in blue states.

[Brittain33]

Conservative would include NJ-11, VA-10, NJ-5, MO-2, GA-6. Uniformly rich, well-educated, not huge into culture wars.
Lib Dem would be MA-8, NY-8, WA-7 (college and affluent liberal); MA-1, VT-AL (rural but atypical for country and not conservative)
Labour would be MN-8, OH-17, IL-17, PA-14, MI-5.

[War on Want]

Tory: GA-6, TX-3, TX-22, AZ-6, NJ-5
Lib Dem: WA-7, VT-AL, NY-8, CO-2, MA-1
Labour: WV-3, PA-12, PA-14, MN-8, OH-17

I agree with brittain for the most part. This excercise makes me want to do this for the whole country...

[Joe Republic]

The singular form of 'Tories' is 'Tory', fwiw.

[War on Want]

The singular form of 'Tories' is 'Tory', fwiw.

I blame Torie(the poster) for messing me up on that.

[I spent the winter writing songs about getting better]

The singular form of 'Tories' is 'Tory', fwiw.

I blame Torie(the poster) for messing me up on that.

and me.

[Хahar 🤔]

Labour: NY-15, NY-16, NY-10, NY-11, PA-2

I'll do the rest later.

[ilikeverin]

I believe Labour can neatly be summed up as "Michigan, Michigan, Michigan, Michigan".  The Conservatives would also be there, o/c, but I'm pretty sure the Lib Dem % in Michigan would be negative.

Minnesota would be fun.

[Bo]

Tory: Somewhere in the rural South
Lib Dems: Affluent liberal areas, such as the San Fransisco subrubs, the DC subrubs, the NYC and Boston suburbs, the Chicago suburbs
Labour: Inner cities and areas with many minorities

[useful idiot]

Lib Dem: ME-2, NH-2, CO-2, MA-1, CA-06

Labour: WV-03, KY-05, MI-13, NY-15, IL-02

Tory: TX-17, WY-AL, UT-03, TX-19, TX-11

[I spent the winter writing songs about getting better]

I believe Labour can neatly be summed up as "Michigan, Michigan, Michigan, Michigan".  The Conservatives would also be there, o/c, but I'm pretty sure the Lib Dem % in Michigan would be negative.

Minnesota would be fun.

MN-01: 3-way tossup. Historically the Tories have the edge, but Lib Dems probably currently hold it.
MN-02: Solidly Tory.
MN-03: Historically solidly Tory, Lib Dems have made gains and runs lately, but no win.
MN-04: Lean Labour. If things get really bad for them the Lib Dems take it.
MN-05: Probably would be currently Lib Dem, but if we got the same Lib Dem/Tory coalition, it'd  vote Labour in the next election. Very anti-Tory all around.
MN-06: Solidly Tory.
MN-07: Probably would vote Tory usually, but not always if there was IRV, might be a strong Lib Dem presence here just because some areas strike me as the types that would hate both the Tories and Labour.
MN-08: Safe Labour.

[Devilman88]

Someone do North Carolina.. I would but I don't know that much about the UK parties.

[Tetro Kornbluth]

Race is nowhere near as a big dividing line in the UK than in the US...

[Brittain33]

Lib Dem: ...CO-2 ...

This was the clear winner for the category that I didn't think of until later.

[Brittain33]

Race is nowhere near as a big dividing line in the UK than in the US...

I steered clear of districts with largely minority populations for that reason--they just don't exist in the UK, at least not recognizably so. (There isn't any district in the U.S. with an Asian population comparable to what you might find in some parts of England.)

[Brittain33]

Tory: Somewhere in the rural South

Plaid Dixie

Or 30 Ian Paisley clones. Districts like KY-5 and TN-1 are largely populated by his cousins...

[Sbane]

Race is nowhere near as a big dividing line in the UK than in the US...

I steered clear of districts with largely minority populations for that reason--they just don't exist in the UK, at least not recognizably so. (There isn't any district in the U.S. with an Asian population comparable to what you might find in some parts of England.)

I wonder if anyone knows how Asians vote. Too bad British exit polls aren't broken up by demographic groups.    

[Filuwaúrdjan]

I wonder if anyone knows how Asians vote. Too bad British exit polls aren't broken up by demographic groups.    

Asians mostly vote Labour, some groups more than others. Sikhs in particular are overwhelmingly Labour. Muslims (especially Kashmiris) have usually been very Labour as well, though 2005 was a big exception in some areas because of Iraq (but things reverted back to normal as early as 2006). Hindus are a largely Labour voting group as well, though there's a sizeable Tory vote amongst middle class Hindus.
Underneath that, things can be more complicated. In some heavily Kashmiri areas the biradari system can have a powerful impact on voting patterns (though it's influence has been waning somewhat in recent years, as an increasing number of younger Kashmiris have started voting Labour for overt class reasons) even in General Elections. Bradford West was a safe Labour seat until 1997 (yeah, srsly) was regarded as a key marginal throughout the Labour government and is now essentially a safe Labour seat again...
You then have the influence that the politics of the mother country can have on voting patterns here. In most Bangladeshi areas, the Labour Party has been seen as an extension of the Awami League while Respect was often seen as an extension of Jameet-e-Islami. In Southall, Labour dominance is based on a coalition of Congress and various Communist groups. And so on.

[Lief 🗽]

So presumably minorities in American would vote overwhelmingly Labour as well, due to similar circumstances: perceived as a different race, lower socio-economic status, a history of oppression, through colonialism/imperialism on the one hand and slavery on the other (though I suspect Asian-Americans, who are generally petty affluent and used to be a solid Republican group, would be Lib-Dem/Tory).

[Хahar 🤔]

In most Bangladeshi areas, the Labour Party has been seen as an extension of the Awami League while Respect was often seen as an extension of Jameet-e-Islami.

That is quite interesting. I did not know that. The association of the Jamaat with the Socialist Workers Party is rather amusing considering their policies (not that those really matter).

[Cubby]

CT-1: Safe Labour, could vote Lib Dem in bad years for Labour

CT-2: Labour or Lib Dem, higher Tory vote than CT-1

CT-3: Safe Labour, could vote Lib Dem in bad years for Labour

CT-4: Safe Tory, since Labour and Lib Dems would split the left wing vote

CT-5: Tory/Lib Dem swing District, would depend on national mood in most years

[Verily]

ME-1: LD, Lab vote not insignificant
ME-2: LD with Cons and Lab both challengers
NH-1: Con/LD marginal, Labour vote not insignificant
NH-2: LD
VT-AL: LD
MA-1: LD
MA-2: Lab
MA-3: Lab
MA-4: Con
MA-5: Lab
MA-6: Lab/Con marginal
MA-7: Lab
MA-8: LD, Lab sometimes challengers
MA-9: Lab, Cons could win in a landslide situation
MA-10: Con
RI-1: Lab, LDs could challenge on a strong tactical vote
RI-2: Lab, Cons could win in a landslide situation
CT-1: Lab
CT-2: Con, Lab could win in a landslide situation
CT-3: Lab
CT-4: Con, LDs could challenge on a strong tactical vote
CT-5: Con, but weird seat. Lab could win in a landslide, LDs could win when Labour is weak

Maybe more when I'm more awake.

[Meeker]

WA-01: LibDem
WA-02: LibDem/Tory marginal, LibDem favored most of the time
WA-03: Three-way marginal
WA-04: Tory
WA-05: Tory
WA-06: Labour
WA-07: LibDem landslide
WA-08: LibDem/Tory marginal
WA-09: LibDem

[Verily]

NY-01: Con
NY-02: Con
NY-03: Con
NY-04: Lab/Con marginal
NY-05: Con
NY-06: Lab
NY-07: Lab
NY-08: LD
NY-09: Lab/Con marginal
NY-10: Lab
NY-11: Lab
NY-12: Lab
NY-13: Con
NY-14: Con, possibly LD
NY-15: Lab
NY-16: Lab
NY-17: Lab/Con marginal (I guess? Would be so polarized...)
NY-18: Con, LDs could challenge
NY-19: Con, again LDs could challenge
NY-20: Con
NY-21: Lab
NY-22: LD
NY-23: LD, due to a Liberal history
NY-24: Con
NY-25: Lab
NY-26: Con, although potentially could have a Liberal history and be LD
NY-27: Lab
NY-28: Lab
NY-29: Con