diff --git a/CMakeLists.txt b/CMakeLists.txt
index b57b01c636b4b02f5481080108e3c89e757fd276..f66d5398b6979877fdee4c85e78dca5f7993017e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@
 
 cmake_minimum_required(VERSION 3.15)
 
-project(Analysis VERSION 41.15
+project(Analysis VERSION 42.0
         LANGUAGES CXX)
 
 # Enable testing with CTest/CDash
diff --git a/ReleaseNotes/v42r0.md b/ReleaseNotes/v42r0.md
new file mode 100644
index 0000000000000000000000000000000000000000..8d94cc0d40b3603e8c4d3aecca5db35bb028310b
--- /dev/null
+++ b/ReleaseNotes/v42r0.md
@@ -0,0 +1,30 @@
+2024-01-29 Analysis v42r0
+===
+
+This version uses
+Rec [v36r0](../../../../Rec/-/tags/v36r0),
+Lbcom [v35r0](../../../../Lbcom/-/tags/v35r0),
+LHCb [v55r0](../../../../LHCb/-/tags/v55r0),
+Gaudi [v37r2](../../../../Gaudi/-/tags/v37r2),
+Detector [v1r25](../../../../Detector/-/tags/v1r25) and
+LCG [104](http://lcginfo.cern.ch/release/104/) with ROOT 6.28.04.
+
+This version is released on the `master` branch.
+Built relative to Analysis [v41r15](/../../tags/v41r15), with the following changes:
+
+### New features ~"new feature"
+
+- ~Flavour tagging | Add support in FunTuple for vector of enums (useful for FlavourTagging info), !1043 (@scelani)
+
+
+### Enhancements ~enhancement
+
+- ~Functors | Add functorcollection for vertex isolation, !913 (@tfulghes)
+- ~Tuples | Add an extra check for []CC in the decay descriptor of FunTuple, !1018 (@jzhuo)
+
+
+### Code cleanups and changes to tests ~modernisation ~cleanup ~testing
+
+- Use `get_hlt1_selreports` instead of `make_data_with_FetchDataFromFile`, !1042 (@graven)
+- Streamline some FunTuple::fill_ functions, !1038 (@graven)
+- Make the []CC check softer, !1041 (@jzhuo)