** Shares of Hartshead Resources HHR.AX jump as much as
13.2% to A$0.043, posting their biggest intraday pct gain since
March 2
** Oil and gas explorer says it entered into an agreement
with Shell U.K. Ltd
** Says agreement sets out key commercial terms for the
transportation and processing of HHR's Phase I gas field
production via Shell's Southern North Sea infrastructure
** Shares hit their highest level since March 3
** About 6.4 mln shares change hands vs the 30-day average
of 3.4 mln shares
** Stock flat YTD, as of last close
(Reporting by Echha Jain in Bengaluru)
((Echha.jain@thomsonreuters.com))