Plain English?
When I read the highlighted text it seemed to mean roughly:
"If we decide to buy back shares and raise the share price and this accidentally triggers the bid rules, the person with 5% of the shares will only be considered as a real bidder on the purchase of more shares."
This seems a very sensible precaution before buying back shares and increasing the value of individual shares. I thought this was quite common where a company had spare cash and grumpy shareholders. Part of "returning value to our shareholders" or similar.
It doesn't seem to relate to the explanations given.