diff --git a/lib/sequencescape-api/associations/belongs_to.rb b/lib/sequencescape-api/associations/belongs_to.rb
index 79d06be..1c7f0cb 100644
--- a/lib/sequencescape-api/associations/belongs_to.rb
+++ b/lib/sequencescape-api/associations/belongs_to.rb
@@ -101,6 +101,12 @@ def object
     def uuid_only?
       @object.__send__(:uuid_only?)
     end
+
+    delegate :hash, to: :uuid
+
+    def eql?(other)
+      uuid == other.uuid
+    end
   end
 
   def belongs_to(association, options = {}, &block)
diff --git a/lib/sequencescape-api/resource/attribute_groups.rb b/lib/sequencescape-api/resource/attribute_groups.rb
index 70e3e8a..53846db 100644
--- a/lib/sequencescape-api/resource/attribute_groups.rb
+++ b/lib/sequencescape-api/resource/attribute_groups.rb
@@ -29,7 +29,11 @@ module Json
     def as_json_for_update(options)
       super.tap do |json|
         begin
-          json.fetch(json_root).merge!(attribute_group_json(options))
+          if options[:root]
+            json.fetch(json_root).merge!(attribute_group_json(options))
+          else
+            json.merge!(attribute_group_json(options))
+          end
         rescue KeyError => e
           # If we get a key error, append the json to out exception to assist diagnosing issues
           e.message << " in #{json.to_json}"
diff --git a/lib/sequencescape-api/resource/json.rb b/lib/sequencescape-api/resource/json.rb
index 0cc1c4d..dec3019 100644
--- a/lib/sequencescape-api/resource/json.rb
+++ b/lib/sequencescape-api/resource/json.rb
@@ -109,7 +109,7 @@ def associations_for_json(options)
     ]
   end
   private :associations_for_json
-  
+
   def must_output_full_json?(options, target = self)
     options[:force] or (options[:action] == :create) or target.changed?
   end
diff --git a/lib/sequencescape.rb b/lib/sequencescape.rb
index fcb5982..fe80645 100644
--- a/lib/sequencescape.rb
+++ b/lib/sequencescape.rb
@@ -40,6 +40,9 @@ module Sequencescape
 require 'sequencescape/work_completion'
 require 'sequencescape/custom_metadatum_collection'
 
+require 'sequencescape/transfer_request_collection'
+require 'sequencescape/transfer_request'
+
 # Pulldown API support
 require 'sequencescape/plate_creation'
 require 'sequencescape/pooled_plate_creation'
diff --git a/lib/sequencescape/plate.rb b/lib/sequencescape/plate.rb
index d3dfe1a..24af76c 100644
--- a/lib/sequencescape/plate.rb
+++ b/lib/sequencescape/plate.rb
@@ -17,6 +17,7 @@ class Sequencescape::Plate < ::Sequencescape::Asset
 
   has_many :wells
   has_many :submission_pools
+  has_many :transfer_request_collections
 
   belongs_to :plate_purpose
   belongs_to :custom_metadatum_collection
diff --git a/lib/sequencescape/transfer_request.rb b/lib/sequencescape/transfer_request.rb
new file mode 100644
index 0000000..2f12327
--- /dev/null
+++ b/lib/sequencescape/transfer_request.rb
@@ -0,0 +1,10 @@
+require 'sequencescape-api/resource'
+
+class Sequencescape::TransferRequest < ::Sequencescape::Api::Resource
+
+  belongs_to :source_asset, :class_name => 'Asset'
+  belongs_to :target_asset, :class_name => 'Asset'
+
+  attribute_accessor :type, :state
+
+end
diff --git a/lib/sequencescape/transfer_request_collection.rb b/lib/sequencescape/transfer_request_collection.rb
new file mode 100644
index 0000000..a08aea2
--- /dev/null
+++ b/lib/sequencescape/transfer_request_collection.rb
@@ -0,0 +1,7 @@
+require 'sequencescape-api/resource'
+
+class Sequencescape::TransferRequestCollection < ::Sequencescape::Api::Resource
+  belongs_to :user
+  has_many :transfer_requests, disposition: :inline
+  has_many :target_tubes, disposition: :inline, class_name: 'Tube'
+end
diff --git a/spec/sequencescape-api/contracts/create-model-c-has-many-inline-nested.txt b/spec/sequencescape-api/contracts/create-model-c-has-many-inline-nested.txt
new file mode 100644
index 0000000..f5de759
--- /dev/null
+++ b/spec/sequencescape-api/contracts/create-model-c-has-many-inline-nested.txt
@@ -0,0 +1,10 @@
+POST /model_c/create HTTP/1.1
+Accept: application/json
+Content-Type: application/json
+Cookie: WTSISignOn=single-sign-on-cookie
+
+{
+  "model_c": {
+    "model_bs": [{"test_attribute":"test_value"}]
+  }
+}
diff --git a/spec/sequencescape-api/modifications_spec.rb b/spec/sequencescape-api/modifications_spec.rb
index 1b61798..45e46af 100644
--- a/spec/sequencescape-api/modifications_spec.rb
+++ b/spec/sequencescape-api/modifications_spec.rb
@@ -70,6 +70,16 @@
       it 'raises if not given an enumerable'
     end
 
+    context 'has_many disposition: :inline nested' do
+      stub_request_from('create-model-c-has-many-inline-nested') { response('model-c-instance-created') }
+
+      it 'takes an array of objects and converts them to UUID'
+      it 'assumes an array of strings are UUIDs' do
+        target.create!(:model_bs => [{ "test_attribute" => "test_value" }])
+      end
+      it 'raises if not given an enumerable'
+    end
+
     context 'has_many' do
       stub_request_from('create-model-c-has-many') { response('model-c-instance-created') }
 
diff --git a/spec/support/namespaces.rb b/spec/support/namespaces.rb
index 9117ffe..163bce3 100644
--- a/spec/support/namespaces.rb
+++ b/spec/support/namespaces.rb
@@ -27,6 +27,7 @@ class ModelB < Sequencescape::Api::Resource
     belongs_to :model_by_simple_name, :class_name => 'ModelA'
     belongs_to :model_by_full_name, :class_name => 'Nested::Model'
     belongs_to :model_with_early_data, :class_name => 'ModelA'
+    attribute_accessor :test_attribute
   end
 
   class ModelC < Sequencescape::Api::Resource