01 March 2011 Uranium Resources plc (Uranium Resources or Company) Mtonya Drilling Results Uranium Resources plc, the AIM listed uranium exploration and development company, is pleased to announce the final assay results from its 2010 drilling programme at the Mtonya Project, Songea, Tanzania. The data obtained during the 2010 drilling programme confirmed the Companys expectations and demonstrated that conditions favourable for roll-front uranium mineralization exist well below the already known horizons.

Of particular note are holes 1, 2, 8, 9, 10 and 11 which intersected beds of permeable arkose sandstone and extensive zones of reduction and pervasive oxidation down to depths of 400 m.

The lithological composition of the host rock units, porosity, location and extent of the oxidized zones indicate ideal geological settings for multiple mineralized roll-fronts.

The scale and intensity of the observed redox processes is particularly encouraging as they are considered adequate for producing significant uranium deposits.

Roll-front uranium deposits form in flat-lying, permeable clastic sediments at the interface of advancing oxidizing groundwater and reducing conditions.

The intensity of oxidation and its spatial extent are indicative of the duration of these processes and volume of the sedimentary rock that has been altered and depleted of uranium and associated elements. The 2010 programme was designed, after extensive and thorough data collation and analysis, to verify the Companys geological and structural model and generate targets with both near-surface and deep mineralization.

The programme comprised 11 vertical diamond drill holes in two phases totalling 4,170 m and targeted the areas with known uraniferous mineralization as well as new zones.

The eleven holes, 300m to 500 m deep and 500m to 4,000 m apart, were positioned in 3 intersecting fences covering a large area 8 kilometres long and 4 kilometres wide. The ongoing in-depth interpretation of geological and geochemical results of the 2010 programme will significantly narrow the search radius and generate defined drill targets for the 2011 programme.

To compress the timeframe and minimize exploration risks, the Company is utilizing sophisticated geological and geochemical modelling to process the 2010 data.

Since acquiring control of the Tanzanian projects, the Company has developed a complex, proprietary geological model by using remote sensing, geophysical, field mapping, and structural interpretation data.

This model is continuously enhanced and updated within the areas with previously known mineralization, the drilling produced contiguous intercepts with significant U3O8 grades in holes 1, 9, 10, and 11.

Details of these are given in the table below. Table 1.

2011 Mtonya Drilling Results (composited intercepts, 100 ppm cutoff) Drill Hole Longitude Latitude From, m To, m Width, m U3O8 ppm URAMT 01 36.52 -10.56 76.60 79.60 3.00 122 92.60 96.60 4.00 215 Including 731 ppm U3O8 at 93.6-94.6 m URAMT 09 36.54 -10.54 20.00 26.00 6.00 157 URAMT 10 36.52 -10.55 15.60 18.10 2.50 144 46.70 54.60 7.90 141 Including 436 ppm U3O8 at 50.6-52.0 m 66.60 69.40 2.80 163 Including 425 ppm U3O8 at 67.6-68.4 m 74.30 75.80 1.50 106 URAMT 11 36.47 -10.55 7.00 11.00 4.00 239 Including 460 ppm U3O8 at 10.0-11.0 m 14.00 16.00 2.00 142 29.00 34.00 5.00 118
The 2010 drilling programme has provided the Company with important data which is particularly noteworthy because of the 1) extensive lateral coverage, 2) far-reaching depths, 3) large-diameter core, and 4) geochemical assays (33 elements) on all of core.

The drill core was thoroughly logged and systematically photographed before and after splitting and sampling.

Certified standards and duplicate samples were inserted into the sample stream.

Transportation of samples to ALS Chemexs Mwanza laboratory was done by an independent party. Competent Persons declaration The information in this report that relates to Exploration Results, Mineral Resources or Ore Reserves is based on information assessed by Alex Gostevskikh who is a Member of the Mining and Metallurgical Society of America.

Mr Gostevskikh has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves.

Mr Gostevskikh consents to the inclusion in the report of the matters based on his information in the form and context in which it appears. **ENDS** For further information please visit www.uraniumresources.co.uk or contact: Alex Gostevskikh Uranium Resources plc Tel: +255 (0) 752 968 062 Ross Warner Uranium Resources plc Tel: +44 (0) 7760 487769 Hugh Warner Uranium Resources plc Tel: +61 (0) 413 621 652 Samantha Harrison Ambrian Partners Ltd (Nomad) Tel: +44 (0) 20 7634 4700 Ben Wright Ambrian Partners Ltd (Nomad) Tel: +44 (0) 20 7634 4700 Jeremy King Optiva Securities Ltd Tel +44 (0)20 3137 1904 Jason Robertson Optiva Securities Ltd Tel +44 (0)20 3137 1906 Hugo de Salis St Brides Media & Finance Ltd Tel: +44 (0) 20 7236 1177 Felicity Edwards St Brides Media & Finance Ltd Tel: +44 (0) 20 7236 1177
About Uranium Resources Uranium Resources plc is an AIM listed exploration and development company.

It is the Companys strategy to advance its existing assets and strengthen its portfolio via opportunistic acquisition.

Uranium Resources has uranium licences in the highly prospective Karoo Basin in Southern Tanzania.
Felicity Edwards St Brides Media and Finance Ltd Chaucer House 38 Bow Lane London EC4M 9AY Tel: +44 (0) 207 236 1177 Mob: +44 (0) 7748 843871 Fax: +44 (0) 207 236 1188 Email: Web: www.stbridesmedia.co.uk