Front is a 3.25-18 Ribbed Mitas H-04 59P
Rear is a 3.50-18 Universal Mitas H-06 62P
I bought them from Wheel House Tyres (part of Central Wheel Company in Birmingham) You can see their tyre selection at www.WheelHouseTyres.co.uk
I think they might actually be the importers for Mitas tyres. They cost about £74 the pair including free delivery, and can be ordered on line.
Here they are. Firstly the front ribbed tyre,
quickly followed by the nice period tread on the rear.
They ride very nicely incidentally
Hope this helps.