SYDNEY, June 29 (Reuters) - Shell Plc said on Wednesday liquefied natural gas (LNG) shipments from its Prelude floating LNG facility off northwest Australia will be disrupted until at least mid-July due to work bans by unions fighting for better pay.

"We have issued a notice to customers that cargoes will be impacted until at least mid-July due to the industrial action," a Shell spokesperson said in an emailed comment. (Reporting by Renju Jose)