''If a guilty verdict is found to be the case, fixed compensation sums are automatically paid.''

That is incorrect. If there has been a trial and a conviction, The Criminal Injuries Compensation Authority, quite rightly imo, will only open the public purse after all reasonable attempts have been made to obtain the money from the guilty party.

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/243480/9780108512117.pdf 

Criminal Injuries Compensation Scheme 2012

Page26 P.98

 Deferring the determination of an application
98.
A claims officer may defer determination of an application in whole or in part:
(a)
in exceptional cases, until the end of any criminal proceedings relating to the
incident giving rise to the criminal injury
which the claims officer is satisfied
are material to the determination;
(b)
until the claims officer is satisfied that the applicant has taken all reasonable
steps to obtain any social security
benefits, insurance payments, damages
or compensation to which the applicant may be entitled in respect of the
same injury; or
(c)
in response to a request under paragraph 14  

Yes there is a detailed tariff for criminal injuries, for anyone interested enough to persevere it starts at Page43, but payment is far from automatic.
You may be surprised to see that the average payment for r-a-p-e is only £11k, tariff for less serious offences is much reduced.

Don't know about ''compensation being'' bandied about jokily, the only ''joke'' is how some seriously think there are hoardes of women(and men)willing to endure the ordeal of disrupting their lives during an investigation and trial, for such a pittance...

unless the allegations were true and their motivation is not money, but justice.