Not quite. 4 ordered (test/training), another 4 operational jets 'agreed in principle'. Once that 'agreed' deal is signed, that leaves a further 10 from the first batch (Main Gate 4) to be ordered to give you your 14 figure.
First 48 'committed to', of which first 4 have been agreed (see above). Final numbers to be revealved at SDSR15, with final bulk order in 2017 (Main Gate 5).
I think the final UK order will be above 48, but less than 120.
Agreed, though I think it might be split A/B buy rather than solely B.