SPH to hive off media business: What is a 'company limited by guarantee'?

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Recent change announced about the Singapore Press Holdings (SPH) [which publishes the national newspaper, The Straits Times] that is affecting the media landscape in Singapore. 

Simply put, the SPH is made up of:

[A] -- its original news production and publishing sector

[B] -- its other core business that it eventually expanded into [e.g. real estate, etc....]

SPH has announced that it is going to separate the two. [B] is the lucrative part of SPH that is turning in profits whereas [A] is currently making losses due to people -- and advertisers -- turning to new media for news. It is thus a commercial decision to 'hive off' [A] to appease shareholders who are unhappy about the losses incurred by [A]. 

After separation, [A] will become a non-profit entity that allows it to receive funding from the govt. The debate now is whether this will compromise the editorial integrity/ independence/ autonomy/ freedom of its publications.

Qn: Is regulation of the press desirable? (Cam. 2017)