The prospect of an astonishing exit from the 28 nation members EU, yes, the so-called potential Brexit event continues to weigh on U.K. assets.

Cable has been collapsing from last few months on the lingering pressure of this historic economic event, today the sterling fell 0.88% to $1.4272 (09:45 GMT). It climbed substantially on Friday, the most in more than two weeks, following the EU deal.

On sovereignty: The U.K. would not now be obliged to commit to "ever closer union" which will subsequently be incorporated into an EU treaty change.

On economy: Well, it's a make or break dilemma for the U.K., analysts perceive this move under an optimistic scenario, in which the UK continues to have a free trade agreement (FTA) with the EU, losses would be 2.2% of GDP. On the flip side, the UK could suffer income falls of between 6.3% to 9.5% of GDP, similar to the loss resulting from the global financial crisis of 2008-09. That is under the researchers' pessimistic scenario, in which the UK is not able to negotiate favorable trade terms.

On employment benefit (the proposal of a crisis brake with respect to in-work benefits): EU member states can compel limitations on employees' access to non-contributory in-work benefits for a period of up to four years from the origination of employment ( after suitable notification), with the degree of restriction being gradually reduced over this horizon, subject to a seven year legislative window.

On child benefit:  Child benefit payments to migrant workers for children living overseas will be recalculated to reflect the cost of living in their home countries.

Restrictions to clamp down on free movement as a route for regularizing unlawful stay in a Member State by bypassing national immigration rules applying to third country nationals.

Safeguards for the UK financial services industry will be introduced to prevent euro zone regulations from being imposed upon the City of London.