(adds DB timetable, more details)

By Anjuli Davies

LONDON, May 18 (Reuters) - London Stock Exchange Group plc will hold its shareholder meeting on the proposed $30 billion merger with Deutsche Boerse in July, the British firm said in an update on Wednesday.

Both exchanges "continue to make good progress with the preparation of the relevant documentation for their shareholders in relation to the recommended all-share merger," LSEG and Deutshe Boerse said in a joint statement.

Reuters reported last week that the two exchanges would let shareholders decide on their proposed $30 billion merger after Britain's June 23 referendum on European Union membership, according to three sources.

The German exchange would not hold a meeting but open a tender offer period once a full set of documents have been filed with regulators, during which shareholders are given a deadline to back or reject the deal.

The end of the acceptance period for the tender offer to Deutsche Boerse shareholders will be in July, the companies said.

(Reporting By Anjuli Davies, editing by Sinead Cruise and Louise Heavens) ((anjuli.davies@thomsonreuters.com; +44 207 542 6670; Reuters Messaging: anjuli.davies.thomsonreuters.com@reuters.net))