The Competition and Markets Authority (CMA) said on Tuesday it would refer the UK telecom tower deal for a deeper "Phase 2" investigation after it initially warned it could lead to higher prices and lower quality services for network operators.
Aisa deemed the probe "absolutely normal" and said he expected the "Phase 2" investigation would not be resolved before around June 2022.
Last year, Cellnex said it would buy 24,600 telecom towers across Europe from CK Hutchison, which owns the Three mobile network in Britain, for 10 billion euros ($11.81 billion).
($1 = 0.8467 euros)
(Reporting by Joan Faus, editing by Inti Landauro)