diff --git a/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/__init__.py b/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/__init__.py
index 2b64ac0aa2d6833c6efd51b42441adff1b7acc4e..905ac824f66ffb330848090bef8c0f2294a76a0e 100644
--- a/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/__init__.py
+++ b/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/__init__.py
@@ -25,6 +25,7 @@ from . import b_to_ll_LFV
from . import b_to_kstarmumu
from . import hlt2_btosmutau_exclusive
from . import hlt2_btostautau_exclusive
+from . import bu_to_xll
# provide "all_lines" for correct registration by the overall HLT2 lines module
all_lines = {}
@@ -41,6 +42,7 @@ all_lines.update(b_to_ll_LFV.hlt2_lines)
all_lines.update(b_to_kstarmumu.all_lines)
all_lines.update(hlt2_btosmutau_exclusive.all_lines)
all_lines.update(hlt2_btostautau_exclusive.all_lines)
+all_lines.update(bu_to_xll.all_lines)
sprucing_lines = {}
sprucing_lines.update(spruce_beauty2xtaul.sprucing_lines)
diff --git a/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/bu_to_xll.py b/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/bu_to_xll.py
new file mode 100644
index 0000000000000000000000000000000000000000..b8d8507ea32e3c937cea9548a4798cc40fcc7ae9
--- /dev/null
+++ b/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/bu_to_xll.py
@@ -0,0 +1,74 @@
+###############################################################################
+# (c) Copyright 2022 CERN for the benefit of the LHCb Collaboration #
+# #
+# This software is distributed under the terms of the GNU General Public #
+# Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING". #
+# #
+# In applying this licence, CERN does not waive the privileges and immunities #
+# granted to it by virtue of its status as an Intergovernmental Organization #
+# or submit itself to any jurisdiction. #
+###############################################################################
+from Moore.lines import Hlt2Line
+from Moore.config import register_line_builder
+from .builders.rd_prefilters import rd_prefilter
+from RecoConf.reconstruction_objects import make_pvs_v2 as make_pvs
+from .builders import rdbuilder_thor
+from .builders import bu_to_xll_builders
+
+all_lines = {}
+"""
+Definition of the b -> X ll exclusive lines
+
+Migration of selections from StrippingBu2LLK
+
+Includes:
+ B+ -> J/psi(1S) K+ (cc)
+for J/psi = e+ e- or mu+ mu-
+
+Contact: Richard Williams (rmw68@cam.ac.uk)
+"""
+
+
+@register_line_builder(all_lines)
+def BuToKpEE_line(name="Hlt2RD_BuToKpEE_Line", prescale=1):
+
+ pvs = make_pvs()
+ dielectrons = rdbuilder_thor.make_rd_detached_dielectron(
+ opposite_sign=True)
+ kaons = rdbuilder_thor.make_rd_detached_kaons()
+
+ Bu = bu_to_xll_builders.make_rd_BToXll(
+ dielectrons,
+ kaons,
+ pvs,
+ Descriptor="[B+ -> J/psi(1S) K+]cc",
+ name="make_rd_BToXll_for_" + name,
+ )
+
+ return Hlt2Line(
+ name=name,
+ algs=rd_prefilter() + [dielectrons, Bu],
+ prescale=prescale,
+ )
+
+
+@register_line_builder(all_lines)
+def BuToKpMuMu_line(name="Hlt2RD_BuToKpMuMu_Line", prescale=1):
+
+ pvs = make_pvs()
+ dimuons = rdbuilder_thor.make_rd_detached_dimuon(same_sign=False)
+ kaons = rdbuilder_thor.make_rd_detached_kaons()
+
+ Bu = bu_to_xll_builders.make_rd_BToXll(
+ dimuons,
+ kaons,
+ pvs,
+ Descriptor="[B+ -> J/psi(1S) K+]cc",
+ name="make_rd_BToXll_for_" + name,
+ )
+
+ return Hlt2Line(
+ name=name,
+ algs=rd_prefilter() + [dimuons, Bu],
+ prescale=prescale,
+ )
diff --git a/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/builders/bu_to_xll_builders.py b/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/builders/bu_to_xll_builders.py
new file mode 100644
index 0000000000000000000000000000000000000000..8329b1d845b2347e6333c5214658ec0540a5bf1a
--- /dev/null
+++ b/Hlt/Hlt2Conf/python/Hlt2Conf/lines/rd/builders/bu_to_xll_builders.py
@@ -0,0 +1,58 @@
+###############################################################################
+# (c) Copyright 2022 CERN for the benefit of the LHCb Collaboration #
+# #
+# This software is distributed under the terms of the GNU General Public #
+# Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING". #
+# #
+# In applying this licence, CERN does not waive the privileges and immunities #
+# granted to it by virtue of its status as an Intergovernmental Organization #
+# or submit itself to any jurisdiction. #
+###############################################################################
+
+from Functors.math import in_range
+from GaudiKernel.SystemOfUnits import MeV
+import Functors as F
+from Hlt2Conf.algorithms_thor import ParticleCombiner
+from Hlt2Conf.algorithms_thor import require_all
+from PyConf import configurable
+
+
+@configurable
+def make_rd_BToXll(
+ dileptons,
+ hadrons,
+ pvs,
+ Descriptor,
+ name="rd_BToXll",
+ am_min=4000 * MeV,
+ am_max=6500 * MeV,
+ B_pt_min=500 * MeV,
+ adocachi2cut=30.,
+ bpvipchi2_max=16,
+ min_cosine=0.9995,
+ FDchi2_min=144,
+ vchi2pdof_max=25.,
+):
+
+ ### Make the Bu or Bs -> hadron l+ l- candidate ###
+
+ combination_code = require_all(
+ in_range(am_min, F.MASS, am_max),
+ F.SUM(F.PT) > B_pt_min,
+ F.MAXDOCACHI2CUT(adocachi2cut),
+ )
+
+ vertex_code = require_all(
+ F.BPVIPCHI2(pvs) < bpvipchi2_max,
+ F.BPVDIRA(pvs) > min_cosine,
+ F.BPVFDCHI2(pvs) > FDchi2_min,
+ F.CHI2DOF < vchi2pdof_max,
+ )
+
+ return ParticleCombiner(
+ [dileptons, hadrons],
+ DecayDescriptor=Descriptor,
+ CombinationCut=combination_code,
+ name=name,
+ CompositeCut=vertex_code,
+ )