This article shows fee undisclosed. https://www.bristolpost.co.uk/sport/football/bristol-rovers-league-one-transfers-3037885
I'm sure we could make a Monty Python sketch out of this similar to SPAM...to the tune of SPAM, SPAM, SPAM, SPAM, SPAM...instead...FREE, FREE, FREE, FREE, FREE would make a good chorus for the Rainham End...