RE: very difficult23 May 2016 12:32
Not sure why only 15% of 'issued' share capital. I can only assume the other 85% hasn't been issued and is in form of warrants or options to the original founders and other shares unissued by way of payment by shares for services etc.
This would need to be cleared up on the prospectus.
As for guessing the mcap on return. It could be anything but 44% of current SEN shares are held by major shareholders. Who mostly paid 5p per share. They won't want to see their holding diluted.
* The issued share capital of the Company on Admission will consist of 27,000,000 Ordinary Shares, comprising the 2,000,000 Ordinary Shares held by the Founder, and 25,000,000 Ordinary Shares that have been allotted to the Placees, at a price of 5 pence per Ordinary Share. The issued share capital of the Company on Admission will also include 30,000 Deferred Shares held by the Founder, which have negligible value. The aggregate subscription price for the 2,000,000 Ordinary Shares and the 30,000 Deferred Shares was £50,000, and in view of the negligible value of the Deferred Shares, the Directors consider that the Founder should be viewed as having paid an average price of 2.5 pence per share for its holding of 2,000,000 Ordinary Shares. 

So I'd like to think as a shell valued at the cash in the bank last week, Oasis should add substantial value to SEN if the prospectus points to a massive leap in revenues from 2015s $13m.
We also have the potential of further acquisitions in the pipeline.
We still have £500k in the bank and access to favourable funding options which doesn't wipe out long term holders like an AIM stock would.
The RNS keeps referring to Oasis being an "enlarged group" and "enlarged company". There may be more deals to be announced as to the make up of Oasis. The loan may not necessarily for operations but they may also be on the acquisition trail.
As a substantial holder, I'm quietly confident we have a multi bag opportunity on re-list.
It's all pretty much guess work until we see the prospectus.