From the winter when I had practically no heating at all:
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thermal base layer (fleece lined compression thermals meant for outdoor exercise, top + leggings). I kept this on at all times and it kept me super warm through the depths of winter. Also super warm thermal socks.
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electric blanket. Once you're going to be sedentary after dinner on the sofa, then this can make you unbearably hot and costs almost nothing to run.
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the kitchen gets heated slightly by cooking appliances and this is a good place to hang out.