you dont get taxed on your house sale, exempt from CGT. a second property will be liable to CGT if there is a capital gain. im not 100% positive about transfers just it seems likely its not counted for CGT. it would come up against Corporation tax if the club made a profit overall.
we dont tax money transfers, taxes are on profit or capital gains.
as a player registration (which is really what you are transferring, as players arent "owned" obvs) isnt a tangible asset (?) i dont believe it would have any CGT, so unless the football clubs turn a profit, no taxes will be...