Is the Diamond Jubilee High School office in Abids open for enquiries during the summer holidays?

We are beginning to look at nursery options for June 2027 for our son, who is at a small preschool at present. Diamond Jubilee High School came up because my client-site days often take me through Abids, and a school on that route would make some pickups possible. I would like to visit before term begins, when it is quieter, but I do not know whether school offices here keep regular hours in May. Has anyone tried visiting a school office during the holidays, this one or a similar one? I would rather not make the trip and find a locked gate. I am not asking about admission criteria yet, only whether a visit this month is realistic.