Now post penguin only work can improve your website ranking. If you are working on UK website or your target country is United Kingdom then you need to submit your website only on UK based directory sites.

Here is Updated Directory List for UK:

S.No UK Directory List Status
1 http://www.020.co.uk Useful
2 http://www.add-site.co.uk Useful
3 http://www.admax.co.uk Useful
4 http://www.advertisingdirectory.co.uk Useful
5 http://www.backlink.org.uk Useful
6 http://www.blue.daffodil.uk.com Useful
7 http://www.Blueclaw.co.uk Useful
8 http://www.bmzww.com Useful
9 http://www.click4choice.co.uk Useful
10 http://www.deaf247.co.uk Useful
11 http://www.deeplinkdirectory.co.uk Useful
12 http://www.dir.uk4net.com Useful
13 http://www.directory.d3developments.co.uk Useful
14 http://www.directory.lincolnshireeye.co.uk Useful
15 http://www.directory.os9.co.uk Useful
16 http://www.directoryinfo.co.uk Useful
17 http://www.dotukdirectory.co.uk Useful
18 http://www.esources.co.uk Useful
19 http://www.find-uk.com Useful
20 http://www.flesko.co.uk Useful
21 http://www.foxdirectory.co.uk Useful
22 http://www.freeindex.co.uk Useful
23 http://www.freeukdirectory.co.uk Useful
24 http://www.free-webdirectory.co.uk Useful
25 http://www.great-british-pages.co.uk Useful
26 http://www.great-websites.co.uk Useful
27 http://www.internet-heaven.co.uk Useful
28 http://www.issouk.com Useful
29 http://www.itouk.com Useful
30 http://www.jambezi.com Useful
31 http://www.link777.co.uk Useful
32 http://www.linkdir.co.uk Useful
33 http://www.Midwalesindex.co.uk Useful
34 http://www.migliana.com Useful
35 http://www.Northwalesindex.co.uk Useful
36 http://www.odurinde.co.uk Useful
37 http://www.only-uk-websites.co.uk Useful
38 http://www.pagerank10.co.uk Useful
39 http://www.peppermintlinks.co.uk Useful
40 http://www.places2b.co.uk Useful
41 http://www.prdir.co.uk Useful
42 http://www.prettyspiffy.co.uk Useful
43 http://www.rdirectory.net Useful
44 http://www.rightbiz.co.uk Useful
45 http://www.seowebdirectory.co.uk Useful
46 http://www.shobby.co.uk Useful
47 http://www.simplyfound.co.uk Useful
48 http://www.slackalice.com Useful
49 http://www.squidlinks.com Useful
50 http://www.stiffupperlist.co.uk Useful
51 http://www.storezone.co.uk Useful
52 http://www.submit2ukdirectory.com Useful
53 http://www.technology-resource.co.uk Useful
54 http://www.the-free-directory.co.uk Useful
55 http://www.thefreewebsitedirectory.co.uk Useful
56 http://www.thegoodwebguide.co.uk Useful
57 http://www.theleisureguide.co.uk Useful
58 http://www.thescottishdirectory.org Useful
59 http://www.the-web-directory.co.uk Useful
60 http://www.t-wells.net Useful
61 http://www.ubwd.co.uk Useful
62 http://www.u-hits.com Useful
63 http://www.uk500.com Useful
64 http://www.uk-businesses.co.uk Useful
65 http://www.ukcd-directory.co.uk Useful
66 http://www.ukdirectory.co.uk Useful
67 http://www.ukforbusiness.co.uk Useful
68 http://www.ukfreedirectory.com Useful
69 http://www.uklinks.org Useful
70 http://www.uknation.co.uk Useful
71 http://www.uksuperweb.co.uk Useful
72 http://www.uktopwebsites.co.uk Useful
73 http://www.uktopwebsites.com Useful
74 http://www.ukwebmasterworld.com/directory Useful
75 http://www.visit-gloucestershire.co.uk Useful
76 http://www.visit-gloucestershire.co.uk/ Useful
77 http://www.vuwl.com Useful
78 http://www.walesindex.co.uk Useful
79 http://www.web-design-cheap.co.uk Useful
80 http://www.web-directories.co.uk/directory Useful
81 http://www.webmasterindex.co.uk Useful
82 http://www.webzdirectory.com Useful
83 http://www.weeboab.co.uk Useful
84 http://www.worldwebdirectory.co.uk Useful
85 http://www.wura.co.uk Useful
86 http://www.wwwi.co.uk Useful
87 http://www.yourparish.co.uk Useful
88 http://www.zopso.com Useful