I just booked a long weekend in the end of November 2018 (2 pax), 36,000 Skymiles per person, R/T in main cabin. Taxes/fees of $184 still suck (as always for LHR), but 36K Skymiles for London is unheard of... The agent whop helped me book has also never seen this fare before... Cheers
I tried to upload the pic of the pricing matrix - lots of dates were available end of November returning early December (mine are 11/28 to 12/3) - I suspect many dates are vailable