MY FIRE NUMBER 45M - invested in ETFs and individual stocks

I have been thinking about this over the past few days and for me its the number I need to be able to live comfortably and have optionalities. Nothing extravagant or over the top. I have a young family,I want to not be stressed about money and be able to provide everything they need and want in life as regular kids ( e.g. no ponies for them) My FIRE number is £1.5M at a 5% withdrew rate. I have around 300k in individual stocks and etfs in ISA stock & shares account. The way I am starting to look at it is that I need 2.5x and if from now invest only in etfs should be able to achieve that in 12 years, individual stocks are to be reduced to max 30% of portfolio. Also, I have around 200k in pension that I have not added to the total.

Thoughts / advice from people that are ahead or already achieved their FIRE number is much appreciated.