There are thousands of these pupils across the country and that is aparet from the ones who have attendances of 20-80% - and there are plenty of those.
An 80% attendance means a child misses the equivalent of a day every week. 90% means half a day every week. If that was what happened at work, we would be sacked.
Schools run all kinds of attendance encouragement schemes, targets, rewards, letters home, certificates. We run courses for parents. We employ 3 full-time attendance staff and all they do us work with parents. They have good relationships with the parents but changing their behaviours is nigh on impossible. We text them, ring them, help them financially where there is a need eg can't afford uniform so he won't come to school. Eventually, we issue warning letters and they are taken to court. They often get paltry fines- £25 and 6 months to pay it at £1 a week.
We have a parent who works in a school as a teaching assistant and can not get her own child into school.
There is a lot of indulgence of children by parents, pandering to them, and also giving in for an easy life to difficult teenagers. By secondary school the pattern is established. Those children who have years of lower than 95% attendance in primary school are those who are even bigger issues in secondary- that is why primaries focus on that number. It does not sound too bad but it is half a day every two weeks.