condensed matter - Why does Pressure Increase the Tc (Critical Temperature) of a Superconductor?

Just a heads up - please make this answer understandable to around 1st year degree level physics - not PhD research. So I can understand it - thanks.

I was wondering why they Critical Temperature (Tc) of a Superconductor will increase as the pressure of the superconductor increases. Has it got anything to do with reduced lattice vibrations OR the changes to the Vortex Lattice - and if so why / how?