There were 3,100 staff present, up from 2,900 in the previous week, but similar to the week before the Easter school holidays.
Roedd 3,100 o staff yn bresennol, i fyny o 2,900 yr wythnos flaenorol ond yn debyg i’r 3,100 y wythnos cyn y gwyliau ysgol Pasg.