Aim rule 4016 Apr 2019 10:00
If the details of the proposed reverse takeover are announced before the AIM company is ready to publish an admission document, trading in the AIM company's shares is normally temporarily suspended under AIM Rule 40 until such time as an admission document is published or the proposed acquisition negotiations are terminated.
The way I see it, if there was reason to believe that it was a definite that an RTO was to occur. The share would be temporarily suspended, but due to them needing to raise money through an open offer it’s in there best interest to state there is no definite RTO taking place as they can’t raise money in a suspended company.
Just my speculation :)