There are those two Deaths, of which the first seems more likely - but again no guarantees-
FINK Clarence C England London, Westminster 1935 VIEW
FINKELL Henry C England London, Pancras 1935 VIEW
It may be worth obtaining the Death Record, to see if the Informant or other details yield a clue.
There is a link on FMP to the GRO Southport Lancashire to order copies.
Like others trying to help you, I have tried the Travel & Migration records pn FMP - but these are By Sea only, so she may have travelled overland by train, if Russia is involved - as seems very likely.