Premier League champions Liverpool have agreed a £116m deal to sign Germany attacking midfielder Florian Wirtz from Bayer Leverkusen.
The fee for the 22-year-old includes a guaranteed £100m and a further £16m in add-ons.
Those bonus payments would only become payable if the Reds achieve a sustained level of success - which would then make it a British record.
The British record for an initial fee remains Chelsea's £107m signing of Argentina midfielder Enzo Fernandez from Benfica in 2023.
Chelsea also brought in Brighton midfielder Moises Caicedo for an initial £100m fee, which could rise to £115m.
The move will, however, be a club record fee for Liverpool.
Uruguay striker Darwin Nunez was brought in from Benfica in a deal worth an initial £64m and rising to a potential £85m with add-ons, while they paid £75m to sign centre-back Virgil van Dijk from Southampton in 2018.
Manchester City had been keen on Wirtz before cooling their interest because of the costs involved in the deal, while Bayern Munich were also linked with him.
