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Spot on. I'm only going by what I've been told by Sparx I've worked with in the past here so I could well be wrong. An RCD or Residual Current Device monitors the earth in a circuit if there is a short to earth it will trip and turn off the current, even if the circuit isn't drawing power. It is possible to have circuits on a consumer unit that aren't protected by an RCD, especially on older installations.
I'm sure that @Mr_Sworld can tell you more.
I'd get your electrics checked by a qualified Sparx if I were you and I'd also invest in a new plug (with correct fuse) and one of these to run the appliance through if you have no other option.
Something like this:
https://www.tlc-direct.co.uk/Products/CPDDS10188SPMSdashPO1.html?source=adwords&ad_position=&source=adwords&ad_id=415703895090&placement=&kw=&network=u&matchtype=&ad_type=&product_id=CPDDS10188SPMS-PO1&product_partition_id=874058290055&campaign=shopping_switchgear_distribution&version=finalurl_v3&gclid=CjwKCAjw4871BRAjEiwAbxXi2_9cD_6zMr6BToQCy4fJeicHahOo14OtzOWRmWHzQX2eiG8Yi2Rr1hoCIqEQAvD_BwE
You need an electrician to fit it, but then all your sockets will be protected, massively reducing the risk of fire due to an earth fault, and also of anyone inadvertently electrocuting themselves.