as well as reduced frequencies on MANDME too with U2
MAN-DME is currently scheduled for 2x weekly. Doesn't seem to be much scope for frequency reductions before the route is cancelled.
There is however an argument that for those living in the UK and who don't particularly care about politics, 2015 would be a really good time to go visit Moscow. One year ago, 1 UK pound bought 55 rubles. Right now, it buys 99 rubles. If while on holiday you buy goods that are priced around ruble costs (ie not closely linked to the price of oil) and sold mainly to the average Russian resident (forget about those stays in 5 star business-centric hotels), you should be able to have a good time on minimal money.