
and another that says:

offer nothing to people not visiting the gym.
Edited to add: I see you are a gym member, but as the gym was closed, perhaps some use can be made of the signs' forbidding nature. Not sure how though - I'll leave that to others.
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Nine
times out of ten these tickets are scams, so consider complaining to
your MP, it can cause the scammer extra costs and work, and has
been known to get the charge cancelled.
Parliament is well
aware of the MO of these private parking companies, many of whom are
former clampers, and on 15th March 2019 a Bill was enacted to curb
the excesses of these shysters. Codes of Practice are being drawn up,
an independent appeals service will be set up, and access to the
DVLA's date base more rigorously policed, persistent offenders denied
access to the DVLA database and unable to operate.
Hopefully,
when life gets back to normal, it will become impossible for those
scammers who are left to continue their vile trade, but until this is
done you should still complain to your MP, citing the new
legislation.
http://www.legislation.gov.uk/ukpga/2019/8/contents/enacted
Just
as the clampers were finally closed down, so hopefully will many of
these Private Parking Companies.