Yes replace the shoes too.Are these the parts Jon? And if so, is there anything else I may as well add too - brake shoes perhaps?
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My rear left did exactly the same previously!
Wheel cylinder cured it.
A word of caution - make sure whatever you buy matches the other side. I noticed there are different sized pistons which provide a different braking force for example 7/8ths 3/4 etc. on my car the original cyls were 15/16ths which I could not find for love nor money - so IIRC I went for the 7/8ths.
Or just replace both at the same time.
It would be written on the cyl assembly.