These amazing simulations will complement the GCSE Electricity perfectly.

Circuit Construction Kit:
https://phet.colorado.edu/en/simulations/circuit-construction-kit-dc
Charges and Fields
https://phet.colorado.edu/en/simulations/charges-and-fields
Ohms Law – V=IR
https://phet.colorado.edu/en/simulations/ohms-law
Balloons and Static Electricity
https://phet.colorado.edu/en/simulations/balloons-and-static-electricity