While switching either gas or electricity, go for the utility provider who can supply you both and this will qualify you for dual fuel discount. Choose to manage your account online and pay by Direct Debit and you could benefit from even further discounts.
Mostly households moved either their gas or electricity to a new supplier when the energy industry was privatized, so that they had the same provider for both. So they benefit from a dual fuel discount, they are possible to pay standard prices and could save by switching to a more competitive tariff.
For more information on energy suppliers visit
http://maketheswitchusa.com/pa/electric-suppliers/