Whilst there is an obligation to record the minutes of a Town/Parish Council meeting, it does not necessarily have to be the Clerk who does that. If the Council does not have a clerk due to sick leave or a yet to be filled vacancy, normally a deputy clerk would do it, but I suspect that anybody who is an elected member or employee of the council can do it. That said what the chair is doing must amount to bad practice even though it is technically permitted. Presiding over a meeting is a singular responsibility and the Chair must be taking some time out of the meeting recording notes in between talking.