Your client is a large UK Pension Scheme. You are to structure and implement the portfolio for the Pension fund. The portfolio is to invest in UK equities and short$-$term cash only and is to be a long$-$only portfolio $($no short sales allowed$).$The initial size is $10$ million with the ability to borrow a further $2$ million. You may invest only in UK$-$domiciled shares listed on the London Stock Exchange. You are being appointed for a $3$ year term. The benchmark is the FTSE $100$ index and your objective is to outperform this.

The question is that when choosing investment strategy for this scenario, is value investing or growth investing best fit in this scenario. Moreover, provide at least $15$criterias to screen the stocks.