How many of the following 10 marginal seats in the House of Commons will change parties in the upcoming 2019 UK elections?
The 10 marginal seats relevant to the resolution of this question follow below (Guardian). For the purposes of this question, each seat is considered to be held by a party as listed.
Scottish Nationalist Party marginal seats (1): North East Fife
Liberal Democrat Party marginal seats (1): Brecon and Radnorshire