I'm pretty sure the answer is yes, but can anyone confirm that this ticket:
http://www.brfares.com/#faredetail?orig=EPH&dest=CUF&rlc=2TR&rte=790&tkt=CBA
is valid
Thameslink: Elephant & Castle - St Pancras International
Great Northern: King's Cross - Finsbury Park
Great Northern: Finsbury Park - Cuffley
The ticket is only available at weekends when there are no through trains from the Thameslink core to Finsbury Park.
http://www.brfares.com/#faredetail?orig=EPH&dest=CUF&rlc=2TR&rte=790&tkt=CBA
is valid
Thameslink: Elephant & Castle - St Pancras International
Great Northern: King's Cross - Finsbury Park
Great Northern: Finsbury Park - Cuffley
The ticket is only available at weekends when there are no through trains from the Thameslink core to Finsbury Park.