In Scotland we have an alternative way forward. If sufficient people can find the courage to take the leap in the dark, Scotland could be an Independent Nation, with probably a slightly left of centre Government. In the Scottish Parliament (elected under a part FPTP, part PR system, we have 4 main parties and room for a few Independents, such that there has to be a measure of co-operation in order to pass legislation.
To my mind this is a better system than the 'winner takes all' set up at Westminster, where MPs from minority parties have little chance of influencing policies or votes. (Except at the moment when the DUP can demand and get whatever they want). I agree with those who say that this is a National Crisis and we should have a Unity Government for the duration of the Emergency. The present set up is not conducive to co-operation between the parties, who are more concerned about their chances in a future GE than the urgent matters of the day.
BTW when people speak of the 3 main parties at Westminster, I presume they mean Con, Lab & Lib, when the reality is that the SNP is the 3rd largest party in the house of commons.