Complex sentence: Cegetel was amongst the first participants of LLU trials in January 2000, but subsequently slowed or froze its investments in LLU, claiming the market and regulatory conditions in France were not acceptable.
Split into simpler sentences: Cegetel was amongst the first participants of LLU trials in January 2000. However, Cegetel subsequently slowed or froze its investments in LLU, claiming the market and regulatory conditions in France were not acceptable.