No, he cannot apply for citizenship. He is an overstayer. But, with three UK born children, it's unlikely that he will be deported. Is he married? What is his partner's status? Is he living with her and the children?

More details? Did he remain in the UK throughout the 10-year period?

If you satisfy all the requirements of ILE, including the KOL requirement, then ask them to correct the error.

Is requesting SAR required in this case?

Your choice. However, for only £10, why not?

Perhaps. Depends on the judgment.

Child shouldn't travel before being granted Bristish citizenship.

See also Older dependent relatives.

Should switch after marriage, before travelling.

Family support is acceptable.

Extend your insurance.

Gaps are allowed.

See also Naturalisation without applying for EEA4?

See also Your Tier 4 sponsor's licence has been suspended. What does this mean?

Click on my links above for more info.

See also FLR(M) rejection because of overstay.

I was thinking about its reference to 11(4).

See also KA (EEA: family permit; admission) Sudan [2008] UKAIT 00052 (25 June 2008).

Watch TV.

If they do not have enough items in their joint names, they may also provide items addressed to each of other individually if they show the same address for both of them. The documents provided must be originals and should be spread over the whole 2 years; they should also be from at least 3 differ...

Please continue in original thread.

If she's admitted as a visitor, then her status as a FLR(M) holder would be voided.

2 years is already more flexible than 5 years.

Carry both old and new passports. Note that visitors may not apply for settlement.

Settlement (245CD).