Have you looked at ThermaSkirt? http://www.discreteheat.com/
Could be a better option, but in a bathroom you really want a heated towel rail anyway.
If it's a small bathroom, avoid putting the heated towel rail close to the loo, it leads to burn knees.
And a sweaty poo.
Or the radiator leads to burnt bum...
@Ramsaye started
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Have you looked at ThermaSkirt?
http://www.discreteheat.com/
Could be a better option, but in a bathroom you really want a heated towel rail anyway.