diff --git a/Hlt/RecoConf/python/RecoConf/hlt2_tracking.py b/Hlt/RecoConf/python/RecoConf/hlt2_tracking.py
index 7c7ea16016c78b8a1eb10c40f6504bdb1b2157db..92ce4c901e5db580051b04caac9d5734ea30c885 100644
--- a/Hlt/RecoConf/python/RecoConf/hlt2_tracking.py
+++ b/Hlt/RecoConf/python/RecoConf/hlt2_tracking.py
@@ -35,6 +35,7 @@ from PyConf.Algorithms import (
     PrLongLivedTracking,
     PrMatchNN,
     PrResidualPrUTHits,
+    PrResidualPrUTHits_v1Tracks,
     PrResidualSciFiHits,
     PrResidualSeedingLong,
     PrResidualVeloTracks,
@@ -1463,7 +1464,7 @@ def make_pr_kf_light_reco_best_tracks(
         hits_ft=ft_hits,
     )
 
-    best_down = make_TrackBestTrackCreator_tracks(
+    best_down1 = make_TrackBestTrackCreator_tracks(
         tracks=[fitted_down],
         name="TBTC_down_{hash}",
         get_ghost_tools=get_GhostProbabilityTools(track_type="Downstream"),
@@ -1478,7 +1479,7 @@ def make_pr_kf_light_reco_best_tracks(
 
     seed_decloned_pr = PrCloneKillerSeedDown(
         TracksInContainer=seed_vs_bestlong,
-        TracksRefContainer=best_down,
+        TracksRefContainer=best_down1,
     ).TracksOutContainer
 
     seed_decloned = fromPrSeedingTracksV1Tracks(
@@ -1486,6 +1487,7 @@ def make_pr_kf_light_reco_best_tracks(
         TrackAddClusterTool=clusters_on_track_tool(),
     ).OutputTracksLocation
 
+    
     # these are used by the monitoring/mcchecking
     seed_fitted = make_PrKalmanFilter_Seed_tracks(
         input_tracks=tracks["Seed"]["Pr"], hits_ft=ft_hits
@@ -1538,6 +1540,34 @@ def make_pr_kf_light_reco_best_tracks(
         fit_tracks=False,
     )["Best"]
 
+    ###
+    best_for_ut_hits = TrackContainersMerger(InputLocations=[best_long, best_down1, best_up]).OutputLocation
+    
+    seed_for_leftover_down = { "Pr" : seed_decloned_pr, "v1" : seed_decloned }
+
+    leftover_ut_hits = { "v1" : best_for_ut_hits }
+    
+    make_residual_uthits = partial(make_ReducePrUTHits_fromV1, leftover_ut_hits)
+
+
+    leftover_down = make_PrLongLivedTracking_tracks(seed_for_leftover_down, make_ut_hits = make_residual_uthits)
+    fitted_leftover_down = make_PrKalmanFilter_Downstream_tracks(
+        input_tracks=leftover_down["Pr"],
+        hits_ut=make_residual_uthits(),
+        hits_ft=ft_hits,
+    )
+
+    best_down2 = make_TrackBestTrackCreator_tracks(
+        tracks=[fitted_leftover_down],
+        name="TBTC_leftover_down_{hash}",
+        get_ghost_tools=get_GhostProbabilityTools(track_type="Downstream"),
+        do_not_refit=True,
+        fit_tracks=False,
+    )["Best"]
+
+    best_down = TrackContainersMerger(InputLocations=[best_down1, best_down2]).OutputLocation
+    ###      
+        
     velo_fitted = make_PrKalmanFilter_Velo_tracks(
         input_tracks=tracks["Velo"]["Pr"],
         hits_vp=vp_hits,
@@ -1893,6 +1923,14 @@ def make_ReducePrUTHits_fromLong(input_tracks, make_ut_hits=make_PrStorePrUTHits
         TracksLocation=input_tracks["Pr"], PrUTHitsLocation=make_ut_hits()
     ).PrUTHitsOutput
 
+@configurable
+def make_ReducePrUTHits_fromV1(input_tracks, make_ut_hits=make_PrStorePrUTHits_hits):
+    """                                                                                                                                                                                                                                       
+    Function to remove PrUTHits used by Long tracks and create a new PrUTHits container for the residual PrUTHits, which are later used as input to PrLongLivedTracking or PrForwardTracking                                                  
+    """
+    return PrResidualPrUTHits_v1Tracks(
+        TracksLocation=input_tracks["v1"], PrUTHitsLocation=make_ut_hits()
+    ).PrUTHitsOutput
 
 def get_fast_hlt2_tracks():
     """Function to get fast set of tracks reconstructed in HLT2