And you can dig around to see what the local aristocracy were worth
:
Shallcross Fitzherbert Widdrington
died 1917
left £42,690 2s 2d
which you can run through an
inflation adjuster
which gives you £3,100,000 in today's money.
You would also have to compare that to average wages in 1917 to get a realistic idea of the value of such a sum.