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In page Ken Buchanan:

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He continued his way up the world lightweight rankings by defeating Leonard Tavarez, Angel Robinson Garcia and Whiter (in a rematch) among others, but on 29 January 1970, he found his first stone on the boxing road when he challenged future WBC junior welterweight champion Miguel Velasquez in Madrid, for the European lightweight title. Buchanan lost a 15-round decision to Velazquez, but nevertheless, he continued his ascent towards the number one spot in the rankings by beating Tavarez in a rematch, Chris Fernandez and Brian Hudson, the latter of whom was beaten by a knockout in five in a defence of the British lightweight title.[3]