Tamsin Blow

Tamsin Blow


CMS Cameron McKenna Nabarro Olswang LLP
Cannon Place
78 Cannon Street
United Kingdom
Languages English

Tamsin Blow is a Partner in the Litigation and Arbitration Group, specialising in commercial, media and public law dispute resolution. Tamsin draws on over ten years’ experience with the firm to offer clients strategic and commercial advice on potential and on-going disputes.

Tamsin acts in substantial commercial disputes including multi-jurisdictional fraud cases for claimants (such as the former subsidiaries of Yukos Oil) and defendants.

Tamsin supports clients through reputation management issues and times of crisis. She draws on her expertise in defamation, data protection and privacy law and her investigations experience, including as advisor to News International in relation to the voicemail interception crisis.

Tamsin also has particular expertise advising gambling operators on a full range of contentious legal and regulatory issues, including supplier disputes, customer disputes, judicial reviews, Gambling Commission investigations and licence reviews and anti-money laundering and social responsibility policies and procedures.

Tamsin is a strong supporter of CMS’ CSR programme, in particular co-ordinating support for the Ladies Day initiative by Whitechapel Mission, which provides support to the homeless and vulnerable in East London.

more less

"Tamsin Blow supports businesses, particularly in the media, technology and gambling sectors, in complex judicial reviews. She has experience handling public law proceedings in the domestic and European courts."

Chambers, 2018

"Next Generation Lawyer"

Legal 500, 2017

"She is sharp, commercial and gets things done."

Chambers, 2017

"Described by peers as "meticulously thorough," and “someone who is going places"."

Chambers, 2016

Relevant experience

  • Judicial review before the English Court of legislation introducing point of consumption licensing and taxation of remote gambling and a reference to the Court of Justice of the European Union on behalf of the Gibraltar Betting and Gaming Association.
  • Yukos entities and former senior management in multi-jurisdictional litigation arising out of the misappropriation of assets and related issues.
  • Successful Supreme Court challenge of HMRC decision to disclose confidential information regarding Ingenious Media and its CEO.
  • Obtaining interim injunction for defamation, final judgment for defamation, strike out of conspiracy claim and several civil restraint orders on behalf of international accountancy firm.
  • Defendant to $120m fraud claim by Kazakh bank JSC BTA against former Chief Executive Mukhtar Ablyazov.
  • Secondment to the Management and Standards Committee of News International during the voicemail interception litigation and acting on the civil cases.
more less


  • 2006 – LPC, Oxford Institute of Legal Practice, Oxford
  • 2005 – GDL, Oxford Brookes, Oxford
  • 2003 – BA Hons, Cambridge
more less


Show only
21 March 2019
CMS Fin­an­cial In­sti­tu­tions Op­er­a­tion­al Re­si­li­ence Re­port
Risk, Re­si­li­ence & Repu­ta­tion
On­line op­er­at­ors pay £14m and per­son­al li­cence hold­ers sanc­tioned...
Over­viewOn 29 Novem­ber, the UK Gambling Com­mis­sion (the "Com­mis­sion") an­nounced that on­line casino com­pan­ies and their seni­or man­age­ment had been sub­ject to wide­spread ac­tion as part of an on­go­ing in­vest­ig­a­tion in­to the way the in­dustry com­bats prob­lem gambling.
Gambling Com­mis­sion fines Daub Al­der­ney £7.1m for anti-money laun­der­ing...
On 13 Novem­ber 2018, the Gambling Com­mis­sion ("Com­mis­sion") an­nounced its find­ings that on­line gambling busi­ness Daub Al­der­ney t/a Stride ("Stride") had breached con­di­tions of its li­cence re­lat­ing to anti-money laun­der­ing meas­ures ("AML") and had failed to.
Gambling Com­mis­sion fines Mark Jar­vis Lim­ited £94,000 for cus­tom­er...
On 15 Oc­to­ber 2018, the Gambling Com­mis­sion (“Com­mis­sion”) an­nounced its find­ings that the in­de­pend­ent book­maker, Mark Jar­vis Lim­ited (“Mark Jar­vis”), breached the Com­mis­sion’s So­cial Re­spons­ib­il­ity Code (“SRC”) after fail­ing to pro­tect a cus­tom­er who was show­ing.
14 Feb 19
CMS’s Tech Up­date Morn­ing (Lon­don)
Gambling Com­mis­sion fines Paddy Power Bet­fair £2,200,000 for so­cial...
On 16th Oc­to­ber 2018, the Gambling Com­mis­sion (“Com­mis­sion”) an­nounced it had reached a reg­u­lat­ory set­tle­ment of £2,200,000 with Paddy Power Bet­fair (“PPB”) over fail­ure ad­equately to in­ter­act with cus­tom­ers who were dis­play­ing signs of prob­lem gambling and.
Court of ap­peal up­holds de­cision that a private com­pany is not amen­able...
In the re­cent Holmcroft ap­peal, the Court of Ap­peal held that the Di­vi­sion­al Court had been cor­rect in de­cid­ing that KP­MG, act­ing as In­de­pend­ent Re­view­er in a mis­selling re­dress scheme ap­proved by what was then the Fin­an­cial Ser­vices Au­thor­ity (“FSA”), was.
Gambling Com­mis­sion rules against Cam­elot
On 23 Au­gust 2018, the Gambling Com­mis­sion (the “Com­mis­sion”) an­nounced that it had reached a reg­u­lat­ory set­tle­ment with Cam­elot in re­spect of weak­nesses in its con­trol and gov­ernance meas­ures. The set­tle­ment re­quired Cam­elot to pay £1.