yes you can groats. Its your right to get the share certificates. you tell tdw that if the market maker cant supply the certificate within 10 days I will take legal action and approach the FSA. Tell them if the reverse was true, eg you sold shares for which you did not have certificates, they (TDW) would demand the certificates and if not they would take action against you. So you are doing excatly that.
I have read a lot of posters in same positon as yourself on the LGB, its a scandal. Demand the certificats off them and seriously threaten them with action and involve the FSA. Tell TDW to demand the market maker your certificates or your money back. ALL of those who hold LGB in their nominee account should demand their certs, that would really put the market maker up shits creek and get them to a heck of a lot trouble by the FSA, effectively having to make refunds or supply the certs (happened to one company eg RSV, where EVO had to reimburse money because they had short sold way above the number of shares in issue).