London Stock Exchange



10 Paternoster Square

London, EC4M 7LS

Telephone 020 7797 1000



21 December 2012

Service Announcement 001/21122012

Reminder of Christmas and New Year Service Arrangements 2012/13

This Service Announcement provides a reminder of the early close trading cycles that will be effective on Monday 24 & 31 December 2012, when as usual, ahead of the Christmas and New Year holidays there will be a half trading day on all London Stock Exchange markets.

Early close trading cycles

Full details of the trading cycles in operation on Monday 24 & 31 December 2012 can be found in the Millennium Exchange Business Parameters Document - Trading Cycle (5th tab) available at tradingservices.

Key timings to note on both days are:

• All markets will start at normal time. SETS, SETSqx, International Order Book (IOB), Order Book For Retail Bonds (ORB) & International Board closing auctions all commence at 12:30GMT;

• They will be of their normal duration with the provision for the standard price monitoring, market order extensions and random periods as required; and

• No further off book trade reports can be submitted after 13:15GMT.

Datasync

For confirmation the final Datasync on 24 & 31 December 2012 will be issued at 14:00GMT.

Wednesday 26 December 2012

On Wednesday 26 December 2012 London Stock Exchange will still provide the following:

• OTC (off-Exchange) trade reporting for European Quoting Service (trading segment EQS) and European Trade Reporting (trading segment ITR) securities; and

• Dissemination of the FTSE indices in operation this day and supported by the Millennium Exchange platform.

Business Days

Full details of London Stock Exchange trading and EUI settlement days can be found at: businessdays

Revisions to other settlement calendars

As usual, revisions to the other settlement calendars can be found in the following places

• IOB as a download at: iob

• International Board as a download at: internationalboard

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Exchange:

▪ London Stock Exchange

Environment:

▪ Live

Type:

▪ Product Adjustment

Products:

▪ Millennium Exchange

Additional Information:

If you have any queries about this announcement please e-mail:

clients@

For technical queries please contact your Technical Account Manager or the Technical Information Desk on 020 7797 3939 (STX 33939).

An archive of previously issued service announcements is available in the technical library section of London Stock Exchange's Internet site



Millennium Exchange Business Parameters Document can be found at:

tradingservices

Customers are reminded that London Stock Exchange may broadcast test data from its production environment at the weekends which should be discarded and not processed.

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