Details seem to now be confirmed on the 2nd Holidays4u flight.
The original one is
OHY3541/2 1940/2040 on Wed nights, presumably an A321 like last year
In May the extra one is OHY4671/2 0900/1000 on Wed mornings then July-October is OHY4673/4 0640/0735 on Thu mornings .... any ideas what aircraft these are planned to be? A321's too?