Line Chart: How to make lines appear only where data exists, prevent line returning to 0

Dear Excel Forum Experts,

I'm trying to manipulate my line graph to prevent the line defaulting back to 0 where there is no data.
I've made a simple example of the problem, attached, which I hope helps to illustrate the point I am trying to convey.

Any help is greatly appreciated,

With kind regards,

Ben

Great - that works fine!

Thanks for your help

Ben