Can I buy two tickets instead of paying for extra baggage?

Hi,

I’m wondering if anyone has tried this before.

The coach company (National Express, FlixBus) charges for extra luggage, but I noticed that buying two separate tickets is actually cheaper than adding an extra bag at checkout.

Would it be possible to buy two tickets under the same passenger name and use the luggage allowance from both tickets?

For example, if one ticket includes 1 pieces of luggage, could I buy another ticket and bring more luggage in total?

I’m not sure if this is allowed or if they only check the passenger name and limit the luggage regardless of how many tickets you have.

Thanks!