The answer is: it depends.
Would you be employed by the school , the local authority or an agency/umbrella company?
Would you be working odd days/weeks as required on a stand-by basis? Or is there a commitment to so many hours a week . Or is it longer term contract- maybe full time for a term.
In my experience schools and local authorities tend to pay according to the scale. They work out a day rate by taking the actual salary for your scale point and dividing it by 195 (the number of teaching days in a year). So someone on scale point M6 gets £31552 ÷185 = £161.80 a day. That means holiday pay is built into your pay rate so you get nothing in school holidays.
But I’m not sure they’d build in the extra points you earned for specific responsibilities or advanced skills unless they specifically need those skills. And given the high cost compared with less experienced teachers, particularly NQTs, you may find schools feel they can get better value for money from more junior teachers. That was my experience
If you are employed through an agency they may pay you a daily rate. This is likely to be less than the above figure since the agencies can easily get NQTs or cover supervisors who will work for £80-£100 a day. You could get more if they need your specific skills but you may find you are pricing yourself out of work. I found this and compromised on lower rates of £100 a day. I was happy to take the cut as I like the flexibility and am glad to avoid all the marking, planning, meetings, after school duties, parents’ evenings, detentions, reports, performance management, training days. etc