Parent requesting a one plan

[Nevercan]

Is it possible to request a one plan from the LEA if the school Senco (headmistress) doesn't believe it is necessary? Our dd1 has been assessed and has severe dyslexia but she doesn't believe a one plan is needed. I would like her to be assessed for one.

What's a one plan? Do you mean EHCP?

If you mean an Education Health and Care Plan, parents can certainly request them. You can do it simply by letter, but check your LA's Local Offer website to see if they have a form. If they want information which only the school can provide (e.g. current attainment levels, precise details of support offered to date) just answer those by asking them to find out from the school : they have to contact them anyway when considering your request. Good luck.