<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message:AIXMBasicMessage xmlns:message="http://www.aixm.aero/schema/5.1/message" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:aixm="http://www.aixm.aero/schema/5.1" xmlns:event="http://www.aixm.aero/schema/5.1/event" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fns="urn:us.gov.dot.faa.aim.fns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:fnse="http://www.aixm.aero/schema/5.1/extensions/FAA/FNSE" gml:id="NMS_ID_1776943263228000"><message:hasMember><event:Event gml:id="Event_1_1776943263228000"><gml:identifier codeSpace="urn:uuid:">adfc9725-de18-4576-bc6f-89fffd9d45f2</gml:identifier><event:timeSlice><event:EventTimeSlice gml:id="Event_TS_1_1776943263228000"><gml:validTime><gml:TimePeriod gml:id="Event_TS_TP_1_1776943263228000"><gml:beginPosition>2026-04-23T11:20:00.000Z</gml:beginPosition><gml:endPosition>2026-04-27T18:00:00.000Z</gml:endPosition></gml:TimePeriod></gml:validTime><aixm:interpretation>BASELINE</aixm:interpretation><aixm:sequenceNumber>1</aixm:sequenceNumber><aixm:correctionNumber>0</aixm:correctionNumber><event:scenario>982</event:scenario><event:textNOTAM><event:NOTAM gml:id="NOTAM_1_1776943263228000"><event:series>A</event:series><event:number>1553</event:number><event:year>2026</event:year><event:type>R</event:type><event:issued>2026-04-23T11:20:00Z</event:issued><event:affectedFIR>EGTT</event:affectedFIR><event:selectionCode>QGWXX</event:selectionCode><event:traffic>IV</event:traffic><event:purpose>BO </event:purpose><event:scope>AE</event:scope><event:minimumFL>000</event:minimumFL><event:maximumFL>999</event:maximumFL><event:coordinates>5130N00009W</event:coordinates><event:radius>12</event:radius><event:location>EGLL</event:location><event:effectiveStart>202604231120</event:effectiveStart><event:effectiveEnd>202604271800</event:effectiveEnd><event:text>GNSS (GPS) SIGNAL JAMMING. JAMMERS LOCATED WI 1.5NM RADIUS PSN&#xD;&#xA;513026N 0000911W (VCY HYDE PARK, LONDON). ACTIVITY MAY AFFECT&#xD;&#xA;ACFT WI 10NM SFC TO 34500FT AMSL OR ABOVE (ALL DIRECTIONS). MAY&#xD;&#xA;ALSO AFFECT AIRBORNE ELECTRONIC SITUATIONAL AWARENESS DEVICES AND&#xD;&#xA;UAS CONTROL. GNSS (GPS) RECEIVERS MAY SUFFER INTERMITTENT / TOTAL&#xD;&#xA;FAILURE OR GIVE INCORRECT POSITION INFO. FOR INFO / CEASE JAMMING&#xD;&#xA;07770 444022 OR 07880 503583. AR-2026-3075/02.</event:text><event:translation><event:NOTAMTranslation gml:id="NT_1_1776943263228000"><event:type>OTHER:ICAO</event:type><event:formattedText><html:div>A1553/26 NOTAMR A1496/26&#xD; Q) EGTT/QGWXX/IV/BO /AE/000/999/5130N00009W012&#xD; A) EGLL B) 2604231120 C) 2604271800&#xD; E) GNSS (GPS) SIGNAL JAMMING. JAMMERS LOCATED WI 1.5NM RADIUS PSN&#xD; 513026N 0000911W (VCY HYDE PARK, LONDON). ACTIVITY MAY AFFECT&#xD; ACFT WI 10NM SFC TO 34500FT AMSL OR ABOVE (ALL DIRECTIONS). MAY&#xD; ALSO AFFECT AIRBORNE ELECTRONIC SITUATIONAL AWARENESS DEVICES AND&#xD; UAS CONTROL. GNSS (GPS) RECEIVERS MAY SUFFER INTERMITTENT / TOTAL&#xD; FAILURE OR GIVE INCORRECT POSITION INFO. FOR INFO / CEASE JAMMING&#xD; 07770 444022 OR 07880 503583. AR-2026-3075/02.</html:div></event:formattedText></event:NOTAMTranslation></event:translation></event:NOTAM></event:textNOTAM><event:extension><fnse:EventExtension gml:id="FNSE_1_1776943263228000"><fnse:classification>INTL</fnse:classification><fnse:accountId>EGGNYNYX</fnse:accountId><fnse:airportname>LONDON HEATHROW</fnse:airportname><fnse:originID>EUECYIYN</fnse:originID><fnse:qline>EGTT/QGWXX/IV/BO /AE/000/999/5130N00009W012</fnse:qline><fnse:lastUpdated>2026-04-23T11:21:03.229057598Z</fnse:lastUpdated><fnse:icaoLocation>EGLL</fnse:icaoLocation></fnse:EventExtension></event:extension></event:EventTimeSlice></event:timeSlice></event:Event></message:hasMember><message:hasMember><aixm:AirportHeliport gml:id="AH_1_1776943263228000"><gml:identifier codeSpace="urn:uuid:">d3955d46-1d64-4025-843b-337248554c15</gml:identifier><aixm:timeSlice><aixm:AirportHeliportTimeSlice gml:id="AH_TS_1_1776943263228000"><gml:validTime><gml:TimeInstant gml:id="AH_TS_TI_1_1776943263228000"><gml:timePosition>0001-01-01T00:00:00.000Z</gml:timePosition></gml:TimeInstant></gml:validTime><aixm:interpretation>SNAPSHOT</aixm:interpretation><aixm:designator>EGLL</aixm:designator><aixm:name>LONDON HEATHROW</aixm:name><aixm:locationIndicatorICAO>EGLL</aixm:locationIndicatorICAO><aixm:ARP><aixm:ElevatedPoint gml:id="EP_1_1776943263228000" srsName="urn:ogc:def:crs:EPSG::4326" srsDimension="2"><gml:pos>51.477500 -0.461389</gml:pos></aixm:ElevatedPoint></aixm:ARP><aixm:extension><event:AirportHeliportExtension gml:id="AHE_EVENT_1_1776943263228000"><event:theEvent xlink:href="#Event_1_1776943263228000"></event:theEvent></event:AirportHeliportExtension></aixm:extension></aixm:AirportHeliportTimeSlice></aixm:timeSlice></aixm:AirportHeliport></message:hasMember></message:AIXMBasicMessage>