Update BBC News for changes in website

recipes/bbc.recipe

@@ -12,18 +12,20 @@ from calibre.web.feeds.recipes import BasicNewsRecipe
 def serialize_image(block):
     yield '<div>'
     block = block['model']
-    media = block['media']
-    alt = prepare_string_for_xml(media.get('alt') or '', True)
+    img = block['image']
+    alt = prepare_string_for_xml(img.get('alt') or '', True)
     for q in ('originalSrc', 'src'):
-        if q in media:
-            src = prepare_string_for_xml(media[q])
+        if q in img:
+            src = prepare_string_for_xml(img[q])
             break
     else:
-        raise ValueError('No src found in media block: {}'.format(media))
+        raise ValueError('No src found in img block: {}'.format(img))
     yield '<img src="{}" alt="{}"/>'.format(src, alt)
     caption = block.get('caption')
-    if caption:
-        yield '<div>{}</div>'.format(prepare_string_for_xml(caption))
+    if caption and caption.get('type') == 'text':
+        yield '<div>'
+        yield from serialize_paragraph(caption)
+        yield '</div>'
     yield '</div>'
 
 
@@ -102,7 +104,7 @@ def parse_article_json(root, abort_article):
         lines.append('<h1>{}</h1>'.format(prepare_string_for_xml(article['headline'])))
     if article.get('contributor'):
         lines.extend(serialize_contributor(article['contributor']))
-    for block in article['blocks']:
+    for block in article['content']['model']['blocks']:
         bt = block.get('type')
         if bt == 'image':
             lines.extend(serialize_image(block))