mumof2, on the face of it, your 1 nº twin-socket is woefully inadequate for the kitchen. Is there really only one (are there other connection points under the counter)?
Where does the tumble dryer connect?
As a rule, I always have separate circuit for appliances such as dishwasher, washing machine, tumble dryer, fridge/freezer & another for the portable stuff (kettle, toaster, microwave etc).
The extension to the fridge, freezer & washing machine will likely see 1.5kW max when everything is running, so assuming the lead is not overly long & isn't coiled, that sounds ok.
In the short term, you could use a block type adaptor for connecting the steriliser, deep fat fryer, bread maker, but not at the same time the kettle is being used. Also, depending upon the toasters (2 or 4 slice), they might be ok.
If it was me, I would establish the exact connected load of each appliance to be sure. (I have estimated the connected load of all your appliances is between 10.00 & 11.3kW)
HTH