sending money out of thailand to UK

i have 1 million  in kasikorn bank at moment,   plus if im lucky enough to sell my condo i will have approx 3.5 million to send back to uk.

if i sent today 3.5 million to uk how much would i get ?         whats best way to send it back ?         i have read something about using super rich then i read another thread about using my kasikorn visa card in uk and withdraw the max out everyday approx £300.00  or 15k baht. 

simply put,  what would you do ?   bearing in mind i sent this money over to thailand at a rate of approx 54 to gbp  over the years,    so i would say im going to lose a clean fotune  ,    though  i have had enough of thailand and dont see me ever retiring there or making any kind of future commitment,     the dream is over for me.   i have tried and failed . 

      money if i get it back without losing too much is to buy a house to live in in UK  and an investment for my daughter when im gone ,    so i think for once a good  investment.