UK LSE Functional Release 1.23.3


On Jan. 18, UK LSE detailed release 1.23.3 and maintenance day.


  • UK LSE detailed the next functional release 1.23.3, and planned CDS maintenance day.
  • Document dated Jan. 18, 2024, and was then received on Feb. 7 due to a fixed feed.
  • Notice Overview
  • The purpose of the Service Announcement is to inform customers of the changes that will be introduced within the next functional release, 1.23.3, and that the Customer Development Service (CDS) will also have a maintenance day on Friday Jan. 26, 2024.
  • The next UK LSE functional release, 1.23.3, will include various changes including two new Group Ticker Plant (GTP) Market Data Group channels, H and J, and re-balancing instruments across current Market Data Group channels to alleviate the message rates.
  • The Market Data Group field will no longer be provided in the XLON Instrument file and will be blank going forward, and this will be effective on the CDS from early Mar. 2024.
  • Where previously one GTP002 Technical Guide was provided that covered all UK LSE, Turquoise and TRADEcho processes, there will be a dedicated Technical Guide for each.
  • The Best Bid Price/Size and Best Offer Price/Size fields are added to end of GTP Trade Summary message to enhance users’ real time understanding of state of order book.
  • Minor currencies will be converted to Major and published via GTP MiFID II Post Trade Feeds only, and the change will be reflected in Notional Currency and Notional Amount.
  • Other changes are all as set out within the details included in Service Announcement.
  • Effectiveness
  • Production go-live for this functional release is scheduled for Monday Apr. 29, 2024.
  • Feb 2024 Release Update
  • On Feb. 21, 2024, UK LSE issued an update on progress of the new release roll-out.
  • The purpose of the notice is to inform customers that the Customer Dress Rehearsal (CDR) for UK LSE and GTP Releases 1.23.3 will take place on Saturday Apr. 6, 2024.
  • UK LSE release 1.23.3 production environment and Group Ticker Plant will be available on day and market data will be generated for all markets to allow customer testing.
  • All customers must register participation to CDR via their Technical Account Manager.
  • Also, as of Monday Mar. 11, 2024, the GTP Production Heartbeat Generator and TCP Responder services will be updated to include new multicast and unicast IP addresses for the GTP Market Data Groups H and J, details of which are in the Technical Library.
  • The new production Replay and Recovery IDs allocated to the new Market Data Groups H and J will be available in early Mar. 2024, with details available from technical team.
  • In the previous communication, UK LSE provided details of how instruments will be re-balanced to the GTP channels and would like to clarify various matters on that process.
  • Although there is no change to scope of channel F (European), all instruments in sector SXEL allocated to channel E (Miscellaneous) will all be moved to channel F (European).
  • The updated UK LSE technical specification and Millennium Exchange and TRADEcho business parameters for release are available in the Next Functional Release section.
  • Apr. 2023 Notice
  • On Apr. 2, 2024, UK LSE issued service announcement notice 001/02042024 relating to next functional release 1.23.3 update and customer dress rehearsal (CDR) guide.
  • RFQ price functionality change will be deployed on a later date to be communicated.
  • The functionality will be removed from Customer Development Service (CDS) Apr. 10.
  • Gave further details including CDR test overview, trading date, reference data, schedule, weekend activity monitor, confirmation/sign off, customer support contacts.

Regulators UK LSE
Entity Types B/D; Depo; Exch; IA; Inv Co; OTC
Reference Nt 001/02042024, 4/2/2024; Nt 001/21022024, 2/21/2024; Nt 001/18012024, 1/18/2024
Functions Compliance; Financial; Legal; Operations; Reporting; Risk; Technology; Trade Reporting; Trading; Treasury
Countries United Kingdom
Category
State
Products Commodities; Custody; Derivatives; Equity; ETFs; Fixed Income; Fund Mgt; Securities; Structured Products
Regions EMEA
Rule Type Final
Rule Date 1/18/2024
Effective Date 4/29/2024
Rule Id 200643
Linked to N/A
Reg. Last Update 4/2/2024
Report Section UK

Last substantive update on 04/05/2024