London Stock Exchange MIT203 - Native Trading Gateway

London Stock Exchange MIT203 - Native Trading Gateway

1.0Introduction
London Stock Exchange provides a Native Trading Gateway as a low latency connectivity solution.
The interface is a point-to-point service based on the TCP/IP standard. 
1.1 Purpose
The purpose of this document is to provide an overview of the full range of services via the Native 
Trading Gateway Interface available on the Millennium Exchange.
1.2 Readership
This document outlines how to connect to the Native Trading Gateway and the detailed message types 
and fields used.
When read in conjunction with the message specifications it is intended that these documents provide all 
of the details directly connected London Stock Exchange customers require to develop to the new 
services. 
This document is particularly relevant to trading and technical staff within the Exchange’s member firms 
and other market participants interested in developing to London Stock Exchange Native Trading 
Gateway. 
1.3 Document series
This document is part of series of documents providing a holistic view of full trading and information 
services available from London Stock Exchange post the migration to Millennium Exchange. 
The current series of documents are set out below:
• MIT201 – Guide to the New Trading System
• MIT202 – FIX Trading Gateway Specification (FIX 5.0)
• MIT203 – Native Trading Gateway Specification (this document)
• MIT204 – Post Trade Gateway (FIX 5.0) Specification
• MIT205 – Drop Copy Gateway (FIX 5.0) Specification
• MIT301 – Guide to Market Data Services
• MIT303 – MITCH Message Specification
• MIT304 – Regulatory News Service Specification
• MIT401 – Reference Data Service Specification
• MIT501 – Guide to the Customer Testing Services
• MIT502 – Guide to Application Certification
• MIT503 – Certification Report
• MIT601 – Guide to Trading Services Disaster Recovery
• MIT701 - Guide to Sponsored Access

• MIT801 – Reject Codes
This series principally covers non-regulatory information. It does not override or supersede the Rules of 
the London Stock Exchange, the AIM Rules or Admission and Disclosure Standards and is intended to 
be read in conjunction with these Rules documents and the Millennium Exchange Parameters documents. 
The latest version of this document series can be found at the following link:
http://www.londonstockexchange.com/products-and-services/millenniumexchange/technicalinformation/technicalinformation.htm
1.4 Document history
This document has been through the follow iterations:

London Stock Exchange MIT203 - Native Trading Gateway