This will be the first study to assess the clinical feasibility of dose escalation with simultaneous integrated boost intensity-modulated radiotherapy for patients with locally advanced cervical cancer. Following screening to confirm eligibility patients will commence a six week treatment period. After this, patients will be followed up by visits to clinic every 3 months for a period of 24 months (2 years). End of study is defined as 24 months after treatment. Patients will be followed up for a minimum of 5 years (as per local policy) after treatment.

Inclusion Criteria:

1. Histologically confirmed squamous cell carcinoma, adenocarcinoma or poorly differentiated carcinoma of the cervix
2. FIGO stage IIB-IVA (any pelvic nodal status) and FIGO stage 1B2 and IIA with pelvic nodal involvement
3. Measurable disease on MRI
4. Age > 18 years (no upper limit)
5. WHO performance status 0,1
6. Adequate renal function with EDTA clearance> 55ml/min
7. Adequate liver function, as defined by ALT or AST less than 2.5 x ULN, and bilirubin less than 1.25 x ULN
8. Adequate bone marrow function, defined by WCC >3.0 x 109/litre, neutrophils > 1.5 x 109/litre and platelets > 100 x 109 /litre
9. Able to understand and give written informed consent

Exclusion Criteria:

1. Evidence of common iliac or para-aortic nodal involvement, or distant metastases
2. Previous history of cancer except skin tumour
3. Previous pelvic radiotherapy or surgery other than toparoscopic node disection
4. Previous history of pelvic adhesions, inflammatory bowel disease, pelvic inflammatory disease or diabetes mellitus
5. Females of childbearing potential must have a negative pregnancy test within 7 days prior to being registered for protocol therapy if required. Acceptable contraception should be used such as barrier or hormonal methods.
6. Females must not be pregnant or breastfeeding