I, BE, late 30s, would call it 'joined-up writing,' but my daughter, 8, also BE, calls it 'cursive' !!!
If you google KS1+cursive (KS1, or Key Stage 1 = primary school Years 1 & 2 = ages 6-8, the two years of primary school when children will typically learn cursive) you'll see that that's the word in use in UK curriculum nowadays.
This isn't necessarily helpful for the OP, since it doesn't reflect current usage among the over-8s (!), but just to say that 'cursive' is the 'correct' terminology in education (now).