234Since the retail market for end-user access services constitutes a separate market, and wholesale local loop access services are indispensable to enabling competitors who are at least as efficient as the appellant to enter into effective competition on that market with an undertaking which, as in the appellant’s case, has a dominant position largely as a result of the legal monopoly it enjoyed before the liberalisation of the telecommunications sector, the establishment of a system of undistorted competition requires that the dominant undertaking should not be able – by means of its pricing practices on that retail market – to impose on all its equally efficient competitors a competitive disadvantage such as to prevent or restrict their access to that market or the growth of their activities on it.
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