WRAPUP 8-Russian and Ukrainian PMs to hold talks on gas row

* Putin and Tymoshenko to meet in Moscow on Saturday

* Czech minister talks of "irreversible damage"

* EU to send delegation to Moscow talks

By Oleg Shchedrov and Yuri Kulikov

MOSCOW/KIEV, Jan 15 (Reuters) - The Russian and Ukrainian prime ministers plan to meet in Moscow on Saturday to try to resolve a gas row that has cut supplies to a freezing Europe.

A minister of the Czech Republic -- current holders of the rotating presidency of the European Union -- said there had been "irreparable, irreversible damage done" to customers' confidence in Russia and Ukraine, "even if they turn on the taps tonight".

Supplies to 18 countries are affected, forcing factories to close and leaving householders shivering in bitter winter cold.

Slovakia said on Thursday it would have to reduce supplies even to heating plants and cut off big industrial users unless Russian gas started flowing via Ukraine again by February.