How many tunnel crossings per hour?

Using the tunnel Sunday morning, having been there at a weekend before there seems to be a reduced service. So does anybody know how many trains per hour there is likely to be on Sunday morning?
Would have phoned euro tunnel but didn’t think about it until it was to late. :blush:

Usually 1 an hour till about 4 then the next 1 is about 6 then 2 an hour i think. Sometimes changes with maintenance work.